The app store is not a free market. If I set up a card trading store, I'm free to set any constraints I want. Maybe I want to only allow users to trade cards th

The app store is not a free market. If I set up a card trading store, I'm free to set any constraints I want. Maybe I want to only allow users to trade cards that were purchased at my shop. That's my right as a private enterprise. Maybe everyone will hate it and go to a different store, and that's the free market. If I somehow prevented any other card stores from existing, then we would have a monopoly