Agree with the cynicism, but while IANAL I believe they are on strong legal grounds. The issue is not the iOS store monopoly directly. Antitrust laws don't forbid monopolies. It's how they affect the competitive environment.
The issue, as I see it, is that Apple prevents them from using other payment systems and other app stores. The practice of tying one line of business (the app store, with its review process/curation/distribution/support) to an unrelated line of business (payment processing or appearing on other app stores) is looked dimly on by antitrust courts.
The issue, as I see it, is that Apple prevents them from using other payment systems and other app stores. The practice of tying one line of business (the app store, with its review process/curation/distribution/support) to an unrelated line of business (payment processing or appearing on other app stores) is looked dimly on by antitrust courts.
Real lawyers, feel free to correct me on this :O