The real I ssue is not the pricing and fee structure! The issue is that Apple and Google can unilaterally breach the agreed-upon contracts thereby taking other developers’ code and then change the contracts to make the developers drop out of the App Store while Apple and Google keep the code. This allows Apple and Google to keep innovative code for themselves without directly buying the smal developer or licensing from them.
While others have already pointed out that neither Apple no Google can directly copy someone else's code b/c of basic copyright laws, there is *nothing* that prevents Apple, Google, OR ANYONE ELSE from appropriating an idea and making better, worse or just different. That's called competition. If the idea behind every single app was barred from adoption by anyone else... we likely would still be living in the stone ages!