If you think 3% is too much, there are plenty of other payment processors... the thing is, most of that 3% is not set by the processor (or kept by them) but is set by the card networks. It is the card networks that should be targeted by antitrust laws.
If there anyone could make an App Store, then we would have a better idea of what the market rate for app stores should be.
If there anyone could make an App Store, then we would have a better idea of what the market rate for app stores should be.