Because those rules are anti-competitive. I don't think anyone is saying that they need to provide support for third-party payment processors themselves, but t

Because those rules are anti-competitive. I don't think anyone is saying that they need to provide support for third-party payment processors themselves, but their rules can't restrict someone else from supporting them. I don't know why that would be controversial. Imagine a world where Google required a 30% cut of everything bought through Chrome. How is what Apple's doing any different from that?