That summer, the company launched what could be considered its first big innovation: allowing other websites to collect a fee when they sent customers directly to Amazon to buy a book. Amazon gave these approved sites an 8 percent commission for the referral. The Associates program wasn’t exactly the first of its kind, but it was the most prominent and it helped spawn a multibillion-dollar-a-year industry called affiliate marketing. It also allowed Amazon, very early on, to extend its reach across the Web to other sites, entrenching it in advance of the looming competition.
