As a developer, I can tell you, you'll fell different when you pay $30M out of $100M for it.
It's the same proportion. What's the matter; $70M not enough for you? Ugh... I hate greedy people. Or are you suggesting that only the HUGE companies get to pay a lower % - how very American...
If you're pulling in that sort of money, make your own device, App Store and employ all the staff skilled in dealing with the tax regulations in every country.