> This is way too reductive. In the US, credit cards are complicated. For instance, I get about 2.5% of every purchase back, either in cash or kind. Yes, the merchant pays 4%, and VISA/matercard take a bit, and my issuing bank takes a bit, but calling that "extracting rents" feels like pure rhetoric.
You just described "extracting rents".
For people like me who treat a credit card as a debit card, I see no reason for vendors to pay that "tax" if there are almost free alternatives. I'm ok losing the cashback which you and I are paying for anyway.