But as long as they force you into their payment plan AND not allow competition (ie additional stores) there definitely seems to be anti-trust problems.

So good luck getting funding for something that you tell the funder could earn millions if it works out. That means less greenfield investment, and ultimately less investment for apps that make less than a million, since only X% will end up doing so, but investment will be impacted for all.

I mentioned this in the context of this particular post where the person is soliciting donations, not the overall app ecosystem. I doubt he's making > 1 million in donations.

Solely under threat of upcoming litigation, yes, they now rip people off half as much.