Apple (and Google) have instigated a race to the bottom, massively devaluing the work of developers... I have never made a secret out of my dislike of the application store model, exactly because of what it does to independent developers. It devalues their work, and independent, small development houses will simply be unable to survive in this race to the bottom. The end result? Apple and a few large companies win, but independent developers and users lose.
I'm pretty sure the exact same trends apply to the Play Store - just with far lower revenue numbers.