So, a government agency wants to find out if Apple, for example, “limits consumer choice and stifles innovation by anticompetitively excluding certain businesses” by dint of using Apple Pay / Apple Card. Fair enough. Consumers should be “protected” if that is happening, and it seems reasonable to gather data on that to make an assessment.
But does this actually happen? Can you, for example, subscribe to an adult pornography website using Apple Pay? Are there market sectors where Apple Card won’t be accepted?