Apple's got a history of changing the rules. I thought it was ridiculous nonsense when I heard that Apple was going to force Amazon to pay 30% for books purchased through their iPhone app too, yet here we are.

they dont sell books through the apps in app purchases though? its just an app that allows you to see your book purchases isn't it?

They used to, before Apple demanded 30%. They couldn't afford to pay that, so they stopped selling books in their iOS app.

Minor nitpick, Apple has always taken a 30% cut of in-app purchases. Amazon never used in-app purchases for transactions, I believe they used to have some sort of in-app WebView that let users buy books on the amazon.com website. Apple told them they needed to either give them a 30% cut of those sales, or remove the WebView.

Well maybe you should spend more time actually knowing about the platform you're talking about.

It was ALWAYS known to developers that purchases made through iOS apps would require you to pay 30% to Apple. Whether that is Amazon, New York Times or some random game.

Nope, you're absolutely, provably wrong. Amazon was selling books on the iPhone long before Apple even had an in-app purchase platform.

http://www.computerworld.com/s/article/9209580/Apple_s_new_A...