It's still wrong that I would pay extra for those cards. I understand that different networks have different fees. But I expect one type of card to cost me the

It's still wrong that I would pay extra for those cards. I understand that different networks have different fees. But I expect one type of card to cost me the same. When you go to a store, you pay the same price, regardless of which card you have. What would be your reaction if you were charged more because you're using a specific type of card? I can't ask my customers to foot the bill, so it's effectively 0.4% I lose.