Platforms, Marketplaces and Social Commerce

Introduction and Context

Digital commerce increasingly takes place through platforms rather than through independent online stores. A platform is an intermediary that enables interactions between two or more participant groups, such as buyers and sellers, advertisers and audiences, or creators and followers. A marketplace is a particular type of platform in which sellers offer products or services to buyers, while the platform supplies search, discovery, transactions, trust mechanisms, payment, logistics, and governance.

This structure has changed the competitive logic of e-commerce. A retailer traditionally controls its website, customer data, pricing, merchandising, and service policies. A marketplace shares or transfers much of this control to a platform operator. The seller may gain access to a large audience and sophisticated infrastructure, but may also face commissions, ranking uncertainty, dependence on platform rules, counterfeit competition, and limited access to customer relationships.

Social commerce extends platform commerce by integrating product discovery, recommendation, interaction, entertainment, and purchasing within social or community environments. It includes shopping through social-media posts, creator recommendations, livestream selling, messaging applications, and mobile applications. The commercial process may therefore begin with a conversation, a video, or a community interaction rather than a conventional search query.

The central managerial problem is not simply whether to join a marketplace or social channel. It is how to evaluate governance, economics, reputation, service quality, technology, customer ownership, and strategic risk.

Learning Objectives

By the end of this chapter, students should be able to:

1. Distinguish platforms, marketplaces, direct-to-consumer stores, and social-commerce channels.
2. Explain network effects, platform governance, seller onboarding, and marketplace trust.
3. Calculate and interpret commissions, contribution margins, take rates, conversion rates, and customer-acquisition economics.
4. Evaluate reputation systems, platform quality, ranking mechanisms, and seller performance.
5. Analyse disintermediation, multi-homing, platform dependence, and channel conflict.
6. Assess app-based, livestream, conversational, creator-led, and social-commerce strategies.
7. Identify ethical, legal, privacy, competition, and consumer-protection issues.

1. Platforms and Marketplaces as Digital Institutions

A platform creates the rules and infrastructure through which independent participants interact. Its value depends on successful participation by several sides. In a marketplace, buyers value variety, reliable fulfilment, fair prices, and trustworthy sellers. Sellers value demand, visibility, payment services, data, logistics, and manageable operating costs. The platform must coordinate these interests while earning revenue.

A marketplace normally performs six functions:

• Discovery: search, categories, recommendations, advertising, and merchandising.
• Matching: connecting a buyer with an appropriate seller or service provider.
• Transaction enablement: cart, checkout, payment authorization, tax calculation, and invoicing.
• Trust creation: identity verification, reviews, guarantees, refunds, dispute resolution, and fraud detection.
• Fulfilment coordination: shipping, inventory visibility, delivery tracking, and returns.
• Governance: rules concerning eligibility, pricing, content, performance, safety, and sanctions.

The platform is therefore not a neutral electronic noticeboard. Its search algorithm, fee schedule, seller policies, data practices, and enforcement procedures shape market outcomes. A change in ranking criteria can redistribute sales among thousands of sellers. A change in commission rates can make a product economically viable or unviable.

Network Effects

A direct network effect occurs when users gain value from more users of the same type—for example, more buyers making a marketplace more active for buyers seeking liquidity. A cross-side network effect occurs when growth on one side increases value for another side: more sellers create variety for buyers, and more buyers create demand for sellers.

Network effects are not automatically positive. Poor sellers, counterfeit goods, fake reviews, fraud, or slow delivery may reduce buyer trust. More buyers can also increase competition among sellers and reduce individual seller visibility. The platform must therefore manage both growth and quality.

A useful conceptual model is:

Here V_b is perceived buyer value, S is seller variety, Q is quality and reliability, T is trust, and C is convenience. The expression is conceptual rather than a universal empirical equation. The variables are not necessarily measured in the same units, and the function f must be estimated for a particular marketplace.

2. Marketplace Business Models and Economics

Platforms earn revenue through several mechanisms:

Commission and Take Rate

A seller’s gross commission can be calculated as:

P is the transaction value subject to commission, r is the percentage commission rate expressed as a decimal, and F is any fixed transaction fee. The formula applies when the platform uses a percentage plus a fixed fee and when taxes, shipping, refunds, and advertising charges are treated separately.

The platform’s transaction take rate is commonly expressed as:

Gross merchandise value (GMV) is the total value of transactions facilitated during a period, subject to the organisation’s definition of whether it includes taxes, shipping, discounts, cancellations, and returns. Take rate is not the same as profit margin because the platform must pay payment, support, hosting, marketing, fraud, and fulfilment costs.

Worked Example: Seller Contribution

Suppose a product sells for $80. The marketplace charges a 12% commission and a $1 fixed fee. Payment processing costs the seller 2.5% of the selling price plus $0.30. The product costs $42, packaging costs $2, and the seller contributes $6 toward delivery.

Marketplace commission = $80 × 0.12 + $1 = $10.60.

Payment fee = $80 × 0.025 + $0.30 = $2.30.

Contribution before overhead = $80 − $10.60 − $2.30 − $42 − $2 − $6 = $17.10.

The contribution margin ratio is:

Thus, the ratio is $17.10 ÷ $80 × 100% = 21.375%, or approximately 21.4%. This is not net profit because fixed salaries, software, returns, taxes, and other overheads remain excluded.

3. Marketplace Governance

Governance is the system of rules, processes, technical controls, and enforcement mechanisms used to coordinate platform participants. Effective governance must balance openness with safety. Excessively weak governance allows fraud and poor quality; excessively restrictive governance suppresses variety and innovation.

Important governance dimensions include:

Entry and Eligibility

Seller onboarding may require identity verification, tax information, bank-account validation, product documentation, licences, insurance, or proof of brand authorization. Risk-based onboarding is often appropriate: a seller of low-risk stationery may require less scrutiny than a seller of medicines, financial products, or children’s safety equipment.

Rules and Prohibited Conduct

Platforms commonly prohibit counterfeit products, unsafe goods, deceptive claims, fake reviews, price manipulation, harassment, money laundering, and circumvention of payment systems. Rules should be clear, accessible, consistently applied, and supported by an appeal process.

Monitoring and Enforcement

Enforcement tools include automated content screening, transaction monitoring, buyer complaints, seller audits, test purchases, identity checks, and human review. Sanctions may include warnings, removal of listings, withholding of funds, reduced visibility, suspension, or permanent termination. Automated enforcement improves scale but can produce false positives and should be reviewable.

Procedural Fairness

A professional platform should explain material decisions, identify the relevant rule, provide evidence where feasible, and allow an appropriate appeal. Sellers need predictable procedures because sudden suspension can destroy inventory turnover and cash flow. Buyers also require protection when a seller disputes a refund or product defect.

Data and Algorithmic Governance

Ranking systems decide which products are visible. Relevant signals may include relevance, availability, price, delivery performance, conversion, reviews, returns, advertising bids, and customer satisfaction. The platform should monitor whether ranking rewards genuine value or merely sellers with greater advertising budgets. Algorithmic quality requires testing for bias, manipulation, instability, and unintended incentives.

4. Seller Onboarding and Lifecycle Management

Seller onboarding is more than account creation. It is a lifecycle consisting of recruitment, verification, activation, education, performance management, and retention.

A robust onboarding process generally includes:

1. Recruitment: identify sellers whose assortment fills demand gaps.
2. Verification: confirm identity, legal status, payment details, and product authorization.
3. Catalogue creation: collect accurate titles, specifications, images, dimensions, and compliance information.
4. Operational setup: define inventory, dispatch times, returns, taxes, and customer-service processes.
5. Activation: conduct a controlled first sale or initial performance period.
6. Development: provide analytics, training, advertising tools, and fulfilment options.
7. Risk management: monitor complaints, cancellations, defects, fraud indicators, and policy breaches.

Poor onboarding creates downstream costs. Inaccurate product data increases returns; weak identity checks increase fraud; unrealistic delivery promises damage the platform’s reputation. Onboarding should therefore optimise not merely the number of sellers but the quality and reliability of active supply.

5. Reputation Systems and Trust

Online buyers face information asymmetry: sellers know more about product condition, authenticity, and fulfilment capability than buyers. Reputation systems reduce this asymmetry by collecting and displaying signals from prior transactions.

Common signals include star ratings, written reviews, verified-purchase labels, seller response time, cancellation rate, delivery performance, return rate, and dispute outcomes. A reputation system is useful only when its signals are credible and interpretable.

Limitations of Ratings

Average ratings can hide important information. A seller with ten 5-star reviews may be less reliable than one with 10,000 reviews averaging 4.7. Ratings may be inflated by review incentives, selective solicitation, fake accounts, coordinated manipulation, or consumers who rate the product rather than the seller. A single average also fails to distinguish product quality from packaging, delivery, or customer service.

Platforms can improve reputation systems by using verified transactions, anomaly detection, review text analysis, recency weighting, category-specific criteria, and transparent definitions. However, review moderation must not remove legitimate negative feedback merely because it harms commercial performance.

A simple weighted rating can be represented as:

Here r_i is an individual rating, w_i is its chosen weight, and R_w is the weighted result. The weights may reflect recency or reliability. This is a descriptive method, not proof that the resulting score is unbiased. Its use requires a clearly stated weighting policy and sufficient data.

6. Measuring Platform Quality

Platform quality has both technical and market dimensions. A fast website is insufficient if sellers are unreliable; a broad assortment is insufficient if search results are irrelevant.

Key dimensions include:

• Usability: clarity of navigation, accessibility, search, checkout, and account management.
• Reliability: uptime, payment success, data integrity, and stable APIs.
• Information quality: accuracy, completeness, freshness, and comparability of product data.
• Transaction quality: correct pricing, secure payment, order confirmation, and invoicing.
• Fulfilment quality: dispatch accuracy, delivery speed, tracking, and returns.
• Trust and safety: identity, fraud prevention, privacy, content moderation, and dispute resolution.
• Seller enablement: analytics, inventory integration, advertising, education, and support.
• Fairness: predictable ranking, proportionate enforcement, and meaningful appeals.

Operational metrics should be interpreted together. A high conversion rate may result from aggressive discounts rather than strong customer loyalty. A low return rate may reflect an unusually restrictive returns policy. Useful measurement combines customer outcomes, seller outcomes, platform economics, and risk indicators.

Common metrics include conversion rate, average order value, repeat-purchase rate, fulfilment defect rate, cancellation rate, return rate, customer complaint rate, seller activation rate, seller retention, and contribution after variable costs.

Conversion rate is:

The denominator must be defined consistently. Visits, sessions, unique users, and product-page views are not interchangeable. A reported conversion rate without a denominator definition can be misleading.

7. Disintermediation, Reintermediation and Multi-Homing

Disintermediation occurs when an intermediary is removed from a value chain. For example, a manufacturer may sell directly through its own website rather than through a retailer. Reintermediation occurs when a new intermediary appears, such as a marketplace, payment provider, comparison engine, or social platform.

Marketplaces create value by reducing search costs, aggregating demand, providing trust, and simplifying transactions. Yet successful sellers may eventually attempt to move buyers to direct channels to avoid commissions and gain customer data. This is a form of platform disintermediation.

Platforms respond through legitimate value creation—better logistics, buyer protection, analytics, loyalty benefits, financing, and discovery—not merely through restrictive contractual controls. Attempts to prevent all off-platform relationships may create legal, ethical, and reputational concerns, especially when the seller introduced the customer or when the platform’s rules are unclear.

Sellers often multi-home, meaning they operate on several platforms at once. Multi-homing reduces dependence and expands reach but increases inventory, catalogue, advertising, customer-service, and fulfilment complexity. A seller should compare channels using contribution after all variable costs, strategic control, customer value, and risk rather than GMV alone.

8. Social Commerce Strategies

Social commerce integrates social interaction and commercial activity. It relies on social proof, identity, community, entertainment, creators, recommendations, and frictionless checkout.

App-Based Commerce

Mobile applications can use saved payment details, push notifications, location, personalisation, loyalty programmes, camera functions, and app-exclusive features. Their strengths include frequent engagement and richer behavioural data. Their weaknesses include installation friction, notification fatigue, privacy concerns, operating-system dependence, and high expectations for performance.

A sound app strategy requires a clear customer benefit, not merely a duplicated website. Examples include rapid reordering, personalised recommendations, loyalty rewards, order tracking, augmented product visualisation, or community features.

Livestream Commerce

Livestream commerce combines video demonstration, real-time interaction, scarcity cues, entertainment, and immediate purchase. It can be effective for products that benefit from explanation, comparison, demonstration, or personality—such as beauty products, fashion, food, hobbies, and consumer electronics.

The main risks are exaggerated claims, undisclosed sponsorship, artificial scarcity, impulsive purchasing, product mismatch, and weak post-sale service. Performance should be measured beyond viewer counts: qualified viewers, engagement, click-through rate, conversion, average order value, refund rate, repeat purchase, and contribution after creator and fulfilment costs.

Conversational Commerce

Conversational commerce uses messaging applications, chat interfaces, human agents, or AI assistants to support discovery and purchase. It is valuable for complex products, repeat orders, recommendations, appointment booking, and service recovery. A conversational system should disclose when a customer is interacting with an AI system, protect personal data, preserve a human escalation path, and avoid making unsupported claims.

Creator and Community Commerce

Creators can provide credibility, demonstration, cultural relevance, and access to niche communities. However, creator effectiveness depends on audience-product fit, authenticity, disclosure, content quality, and measurable incremental sales. A large audience does not guarantee high commercial value. Contracts should specify disclosure, intellectual-property rights, brand-safety standards, data access, content ownership, payment terms, and responsibility for misleading claims.

Social-Funnel Logic

Social commerce often follows a different path from search-led shopping:

1. Exposure through content or community interaction.
2. Attention and emotional engagement.
3. Social proof or creator explanation.
4. Product consideration.
5. In-platform or linked checkout.
6. Delivery, review, sharing, and repeat engagement.

The funnel is not necessarily linear. A consumer may see a product repeatedly, discuss it with friends, save it, and purchase later. Attribution should therefore be interpreted cautiously, especially where several channels influence the purchase.

9. Ethics, Law and Responsible Governance

Marketplace and social-commerce operators manage power over visibility, access, data, and income. Responsibilities therefore extend beyond technical performance.

Important issues include:

• Privacy: collecting only necessary data, explaining purposes, securing information, and respecting consent and access rights.
• Consumer protection: accurate descriptions, transparent pricing, fair returns, clear terms, and protection from deceptive practices.
• Advertising disclosure: sponsored creator content and affiliate relationships should be clearly identified.
• Product safety: hazardous, counterfeit, recalled, or regulated goods require enhanced controls.
• Competition: self-preferencing, discriminatory access, tying, exclusive restrictions, and exploitative fee changes may attract regulatory scrutiny.
• Labour and sustainability: fulfilment practices, gig work, packaging, returns, and delivery emissions should be considered.
• Accessibility and inclusion: interfaces, payment methods, language, and customer support should not unnecessarily exclude users.
• Algorithmic accountability: affected parties need understandable explanations and routes for correction or appeal.

Legal requirements vary by jurisdiction. Managers must consult applicable consumer, privacy, competition, tax, intellectual-property, product-safety, and advertising laws rather than assuming that a platform’s standard terms are sufficient.

10. Illustrative Case: CraftHome’s Marketplace Expansion

Background

CraftHome is a fictional small business selling handmade home-decor products. It has a modest direct website and is considering joining a large marketplace and using livestream demonstrations through a social platform.

Problem

The marketplace promises access to millions of buyers but charges a 14% commission, a fixed $0.50 order fee, and optional advertising charges. CraftHome worries about lower margins, imitation products, dependence on platform ranking, and loss of direct customer relationships. Its livestream team has limited experience and cannot provide continuous support.

Analysis

The business first calculates contribution by channel. Its average marketplace order is $65. Variable product and packaging costs total $31, delivery support is $5, and payment costs are $1.90. Marketplace fees are $65 × 0.14 + $0.50 = $9.60. Contribution before advertising and fixed overhead is therefore $65 − $31 − $5 − $1.90 − $9.60 = $17.50.

The direct website has no marketplace commission but requires an average paid-acquisition cost of $8 per first order and software and payment costs of $3.10. Its contribution is $65 − $31 − $5 − $3.10 − $8 = $17.90. The direct channel is only slightly better for a first purchase, but it may become more valuable if repeat purchases occur without equivalent acquisition cost.

The marketplace nevertheless offers discovery and trust that CraftHome cannot quickly build independently. The appropriate decision is therefore not a simple choice between channels.

Approach and Solution

CraftHome adopts a controlled multi-channel strategy:

• It lists a selected range on the marketplace rather than its entire catalogue.
• It sets a minimum contribution threshold and excludes products that cannot support marketplace costs.
• It uses the platform’s fulfilment option only where delivery reliability offsets its fee.
• It photographs and describes products distinctly to reduce confusion with imitators.
• It monitors return reasons, seller rating, cancellation rate, and contribution after advertising.
• It retains the direct website for product education, loyalty, wholesale enquiries, and customer service permitted by applicable platform rules.
• It tests two livestreams with a trained creator, disclosing sponsorship and tracking incremental sales rather than relying on views.
• It creates a crisis procedure for counterfeit complaints, delayed orders, and unsafe product reports.

Outcome

After one quarter, marketplace sales increase reach but generate lower contribution per order than direct sales. The marketplace nevertheless produces new customers who later purchase higher-margin products through permitted repeat interactions. Livestream sales are modest but reveal that demonstrations of product durability perform better than discount-led broadcasts. CraftHome continues both channels, but reviews the decision monthly using contribution, repeat purchase, service workload, and platform-policy risk.

Learning Points

The case demonstrates five principles. First, GMV is not profit. Second, channel decisions must include customer-acquisition and service costs. Third, marketplaces can be valuable even when their fees are high if they supply demand and trust. Fourth, social commerce requires content and community capabilities, not merely a “buy” button. Fifth, multi-homing reduces dependence but increases operational complexity.

11. Contemporary Developments and Best Practices

Current platform commerce is shaped by integrated fulfilment, retail media, embedded finance, generative AI, social discovery, and stricter regulation. AI may assist with catalogue enrichment, translation, search, demand forecasting, fraud detection, service triage, and personalised recommendations. It can also reproduce biased ranking, generate inaccurate product claims, expose confidential data, or make opaque decisions. Human oversight, testing, audit logs, and escalation remain essential.

Retail media is expanding because platforms possess transaction and behavioural data. Sponsored listings can help sellers gain visibility, but platforms should distinguish advertising from organic results and disclose commercial ranking influences where appropriate.

Practical best practices include:

1. Define channel objectives before selecting a platform.
2. Calculate contribution after commission, payment, advertising, returns, fulfilment, and service costs.
3. Maintain accurate, complete, and locally appropriate product information.
4. Treat onboarding as risk management, not administrative paperwork.
5. Monitor quality and trust metrics alongside sales metrics.
6. Establish an owned customer relationship where lawful and strategically appropriate.
7. Avoid dependence on a single platform or algorithm.
8. Test social formats with controlled experiments and incremental measurement.
9. Make sponsorship, pricing, scarcity, and AI interaction transparent.
10. Prepare documented procedures for complaints, recalls, fraud, account suspension, and data incidents.

Chapter Summary

Platforms and marketplaces coordinate buyers and sellers through discovery, transactions, trust, fulfilment, and governance. Their value arises from network effects, but growth without quality can produce fraud, poor service, and declining trust. Marketplace economics must be evaluated through commissions, take rate, contribution margin, acquisition cost, returns, and operational workload rather than GMV alone.

Seller onboarding, reputation systems, ranking algorithms, and enforcement determine whether a platform is safe and commercially useful. Procedural fairness, transparent rules, reliable data, and meaningful appeals are central to sound governance. Disintermediation creates tension because successful sellers may seek direct relationships, while platforms must justify their role through discovery, trust, logistics, analytics, and service.

App-based, livestream, conversational, creator-led, and community commerce extend the customer journey beyond conventional search. Their effectiveness depends on customer fit, content quality, trust, measurement, disclosure, privacy, and post-sale performance. Contemporary platform strategy therefore requires economic analysis, operational competence, ethical governance, and the ability to manage dependence across multiple digital channels.

Key Terms

Platform: A digital intermediary that enables interactions between two or more participant groups.

Marketplace: A platform where independent sellers offer goods or services to buyers.

Network effect: A change in user value resulting from changes in participation by users on the same or another side of a platform.

Cross-side network effect: A network effect in which growth on one participant side affects value for another side.

GMV: Gross merchandise value, or the total value of transactions facilitated during a defined period.

Take rate: Platform transaction revenue divided by GMV, usually expressed as a percentage.

Commission: A percentage or fixed fee charged by a platform for facilitating a transaction.

Seller onboarding: The process of recruiting, verifying, activating, educating, and managing sellers.

Platform governance: Rules, processes, technical controls, and enforcement mechanisms that coordinate platform participants.

Reputation system: A mechanism that communicates trust signals based on prior transactions or interactions.

Disintermediation: Removal of an intermediary from a value chain.

Reintermediation: Introduction of a new intermediary into a value chain.

Multi-homing: Participation by a user or seller on multiple platforms.

Social commerce: Commerce integrated with social interaction, content, community, or creator activity.

Livestream commerce: Selling through real-time video that combines demonstration, interaction, and purchasing.

Conversational commerce: Product discovery, service, or purchasing through messaging or dialogue interfaces.

Retail media: Paid advertising and promotional services operated by a commerce platform.

Contribution margin: Revenue remaining after specified variable costs are deducted.

Algorithmic governance: Use and oversight of computational rules that influence visibility, access, or enforcement.

Review Questions

Short Answer Questions

1. What distinguishes a marketplace from a conventional online store?
2. Define take rate and explain why it is not equivalent to profit margin.
3. Identify three functions performed by marketplace governance.
4. What is multi-homing, and why might a seller use it?
5. Name two risks associated with reputation systems.

Long Answer Questions

1. Explain how cross-side network effects create value and risk in a marketplace.
2. Discuss the main stages of seller onboarding and the consequences of weak onboarding.
3. Evaluate the role of reputation systems in reducing information asymmetry.
4. Compare app-based, livestream, and conversational commerce strategies.
5. Explain how a platform can balance openness, innovation, safety, and procedural fairness.

Analytical / Application Questions

1. A seller has a $100 selling price, a 10% commission, a $1 fixed platform fee, $3 payment cost, $48 product cost, $4 packaging cost, and $8 delivery contribution. Calculate contribution before overhead and explain whether the result is sufficient for a profitable strategy.
2. Design a dashboard for evaluating a marketplace channel. Select at least eight metrics and explain how each could support a managerial decision.
3. A creator’s livestream attracts many viewers but produces high returns and low repeat purchase. Diagnose possible causes and recommend a revised measurement and content strategy.

Multiple Choice Questions with Answers

Question 1

Which function is most directly associated with marketplace governance?

A. Setting rules for eligibility, conduct, and enforcement

B. Manufacturing every product sold

C. Eliminating all competition among sellers

D. Guaranteeing that every seller earns a profit

Correct Answer: A. Setting rules for eligibility, conduct, and enforcement

Question 2

A marketplace transaction is worth $80, with a 12% commission and a $1 fixed fee. What is the platform commission?

A. $9.60

B. $10.60

C. $11.60

D. $12.00

Correct Answer: B. $10.60

Question 3

What does a platform take rate generally measure?

A. Seller profit divided by inventory

B. Buyer satisfaction divided by visits

C. Platform transaction revenue divided by GMV

D. Returns divided by advertising expenditure

Correct Answer: C. Platform transaction revenue divided by GMV

Question 4

Which practice most improves the credibility of a reputation system?

A. Allowing anonymous reviews from non-buyers

B. Displaying only five-star reviews

C. Using verified-transaction reviews and detecting anomalies

D. Removing negative reviews whenever a seller complains

Correct Answer: C. Using verified-transaction reviews and detecting anomalies

Question 5

What is multi-homing?

A. A buyer placing two items in one cart

B. A seller operating across multiple platforms

C. A platform using several warehouses

D. A customer using several payment cards

Correct Answer: B. A seller operating across multiple platforms

Question 6

Which is a cross-side network effect?

A. More sellers increase product variety for buyers

B. A buyer changes from a laptop to a phone

C. A seller changes its product packaging

D. A platform improves its server speed

Correct Answer: A. More sellers increase product variety for buyers

Question 7

Which metric is most directly concerned with the percentage of relevant visits that result in purchases?

A. Take rate

B. Conversion rate

C. Return rate

D. Seller activation rate

Correct Answer: B. Conversion rate

Question 8

Which feature is especially important in conversational commerce involving AI?

A. Hiding the use of automation

B. Removing all human escalation

C. Disclosing AI interaction and providing escalation where needed

D. Allowing unsupported product claims

Correct Answer: C. Disclosing AI interaction and providing escalation where needed

Question 9

A product sells for $65. Marketplace fees are $9.60, product and packaging costs are $31, delivery support is $5, and payment costs are $1.90. What is contribution before overhead?

A. $15.50

B. $17.50

C. $19.40

D. $21.10

Correct Answer: B. $17.50

Question 10

Why can a high GMV channel still be strategically unattractive?

A. GMV always excludes sales

B. High GMV guarantees high returns

C. Commissions, advertising, fulfilment, returns, and service costs may eliminate contribution

D. GMV measures only employee salaries

Correct Answer: C. Commissions, advertising, fulfilment, returns, and service costs may eliminate contribution