As for credit card processing services, generally Visa and Mastercard are enforcing policies of the banks that actually provide the credit; they simply take the heat because they're paid to. But on that note, both the CEOs of Visa and Mastercard are...Republican donors...almost exclusively...and so would, if anything, favor right-leaning websites such as OAN.
Generally! I know at least one American comedian who is banned by both for taking jabs at you know who...
And no you just dont become a domain registrar like that. You need to be quite privileged to do that.
And becoming a domain registrar requires a demonstration of technical capabilities, but otherwise does not require any privileges. Literally anyone can apply to become a domain registrar if they can demonstrate that they actually know how to do it.