I have friends that released games on the apple store, and others that developed on a debian box and released on 'alternative' stores.
I can't post values that aren't mine. But i can say that none made much more than others ...from what they tell me.
one would probably compile on a friends mac and sell on the apple store, but since he would have all the hassle of also setting up a bank account in the US he never bothered.
...or actually, $1,999.99
i think i will pass.