In one email, Schiller explained that Apple initially made an exception for Amazon because “users would be buying books on a Kindle device and later accessing them on iPhone.” As Apple sold more iPhones, iPads, and iPod touches, however, Schiller thought it was time to drop this exception. In fact, what actually prompted Schiller to reinvestigate this situation, according to the emails, is that Amazon ran a series of advertisements on how you could still access your Kindle books if you switched from iPhone to Android or vice versa. […] These conversations were taking place as Apple was also planning to announce new App Store policies for subscriptions. In his response, Jobs said that Apple could say Amazon “must use our payment system for everything” and say the change was triggered by the new newspapers and magazines subscription policies. “If they want to compare us to Android, let’s force them to use our far superior payment system,” Jobs wrote.
“It’s time for them to use our payment mechanism or bow out,” Jobs said in a separate email. In response to an email from Cue, Jobs also emphasized that iBooks would be the only bookstore on iOS devices: “I think this is all pretty simple — iBooks is going to be the only bookstore on iOS devices. We need to hold our heads high. One can read books bought elsewhere, just not buy/rent/subscribe from iOS without paying us, which we acknowledge is prohibitive for many things.”
Read more of this story at Slashdot.