The thing about this app is that they don't advertise donations anywhere, and people aren't donating for the app, they are donating for the content — and that's

The thing about this app is that they don't advertise donations anywhere, and people aren't donating for the app, they are donating for the content — and that's available everywhere. You know, the same criteria that Apple uses to distinguish Kindle and Dropbox from non-content-reader apps. The service Google provides is the Play Store, and it'd be extremely reasonable for everyone to pay for it. We aren't entitled to that for free. On the other hand, a cut of all transactions? How about a flat baseline fee for platform development plus usage-based fees for everything else, from bandwidth to support? But then they wouldn't be able to double dip on users and app developers... Plus, they so kindly give you so much exposure on a platform built themselves! You wouldn't expect to rent a place in Times Square and not pay for it with a percentage of your income, right?