How does an online auction site earn revenue from a transaction?

• A. By charging buyers a commission on sales
• B. By collecting a fee from sellers
• C. By selling user data to advertisers
• D. By advertising products on their site

Answer: (B)

An online auction site typically earns revenue by collecting a fee from sellers. This practice is a common model for platforms that facilitate transactions between buyers and sellers. When a seller lists an item for auction and successfully sells it, the site takes a percentage of the sale or charges a flat fee for the listing and the transaction. This commission structure incentivizes the auction site to provide a secure and efficient platform for both parties, ensuring the process runs smoothly while generating revenue through these seller fees.

Other options may involve different revenue-generating strategies, but they do not represent the primary source of income for most online auction sites. For instance, while charging buyers a commission on sales could be a potential income source, the more standard practice is to charge sellers. Selling user data to advertisers might also be a practice seen in various digital business models, but it is less common for auction sites, which focus more on the transaction between buyers and sellers. Advertising products on the site can serve as an additional revenue stream but is usually secondary to the fees collected from sellers, reinforcing why the collection from sellers is the main revenue mechanism.