Which of the following best illustrates the transaction fee revenue model?
A) eBay receives a small fee from a seller if a seller is successful in selling an item.
B) Epinions receives a fee after steering a customer to a participating Web site where he or she makes a purchase.
C) Flickr provides basic services for free, but charges a premium for advanced services.
D) Apple accepts micropayments for single music track downloads.
Answer: A
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