No, you misread. I have a commercial relation with Steam and I am happy for them to chose what game they sell and what game they don’t (and as a matter of fact I buy more games on gog than on Steam). I don’t have a relation with Visa and I object to them exercising any control over what I can or cannot buy.

When I buy an Apple phone, it is my phone and Apple should not be able to exercise any control over who I do business with on said phone.

However, I get the eerie feeling that I didn't buy a product even though I paid for it and I subscribed to some service instead.

Again, that is not the point I am making. I am not even necessarily disagreeing with you on that point. I am merely pointing out that I am perfectly able to make a rational compromise and that it does not mean that I accept a random company interfering with my life. If you have something to say on that, fine. Otherwise, what is the point?

There aren't, because all of them have no choice but to use Visa, Mastercard, etc. The monopoly isn't Steam, it's Visa et al.