There are basically none, because the fees are low and card issuers are not allowed to rob retailers with insane fees. If you have a cafe or restaurant where ma

There are basically none, because the fees are low and card issuers are not allowed to rob retailers with insane fees. If you have a cafe or restaurant where margins are already low then it would be crazy to pay additional 2-3% tax on every payment. No one wants to accept amex here.