[soljin2000]

I think you have this backwards. Apple doesn't provide distribution for Amazon Kindle. This is like if you bought an HP laptop and charging 30% for each purchase you make with an application simply because the content falls within a certain category. Nothing is stopping Apple from declaring tweets news feeds and charging per transmission. It's not likely to happen but they can do it at any point. This just illustrates the danger of doing business on a closed platform with absolute control. They are looking more and more like Microsoft everyday. As developers or businessmen you would be a fool to support Apple.

[Dylanlacey]

It's more like you bought a ticket to an event hosted by Apple and while there, Amazon set up a free booth giving away carry bags.

Every time you buy something from Amazon (at the event) to put in the carry bag, Apple takes 30% of the purchase price whilst screeching "WE ALLOWED YOU TO GIVE AWAY THOSE BAGS!"

So, you've paid money for a platform. Amazon showed up on that platform and gave away something for free, taking a freely available booth to do so. THEN they used that to encourage you to buy things from them. And Apple went nuts and demanded they get 30%, even though you paid for entry and they were giving booths away for free.