Wallet/Qrcode payments in many countries are roughly free. Visa/MC/Banks charge roughly 3-5% when you account for all fees (ie: Stripe). The security angle is also BS because these costs are hidden from consumers as they are thrown on merchants who will average them out again on consumers.

They are draining/milking the cow. At some point, they had significant value in quick information transmission when the internet and smart phones weren't really a thing. But now the only advantage is chargebacks/refunds which coincidentally, the experience there is being made shittier.

Still, not worth the 3-5% premium. Glad many merchants are starting to charge for credit card use and push back.