You can no longer purchase Kindle books through the Amazon app on Android
> Amazon's made it a little harder to buy Kindle books on AndroidNo.  Apple and Google have made it a little harder.  While I have no sympathy for Amazon usually, they're one of the very few that could actually fight this effectively and finally bring this App store madness under control.  I would be very careful about messing with Amazon's money.  The whole payments/app store paradigm is on shaky ground anyway.  It really will not take much for someone like Amazon to get the anti-trust ball rolling.