Earlier quoted context omitted.
Antitrust rules apply for abuse of dominant market power (which Google certainly has) even if theoretical alternatives exist. It does not matter that it's not literally a monopoly, as that is not the legal bar that needs to be passed for Google to be limited in what they can and can't do.
>which Google certainly has You’re conflating some ideas here. A marketplace owner always has “dominant market power” over the market they own. That’s the nature of marketplace, the owner gets to set certain rules like the types of payments accepted at the marketplace, because that is literally the job of a marketplace. Google also has dominant market share, since their App Store is the best for android, but that’s l…
In this case, the leveraged market is the app store, and the restrained market is mobile payment processing.