That's assuming that people's choice of bookstore is influenced by links. When I buy a book from a website (or pretty much anything from a website) I always ch

That's assuming that people's choice of bookstore is influenced by links. When I buy a book from a website (or pretty much anything from a website) I always check the price on Amazon. So the only way the affiliate program helps them to sell to me is by encouraging bloggers to write reviews. I'd guess that's true for a lot of people.