This is person to person. I buy stuff from the bodega a few times a week. I use my card because that's my preferred payment method. I never carry cash around. I wish they, "made" the same off me either way but it's not really my fault that it costs them something for me to pay in a convenient way.

To be fair, credit cards in the US can have great rewards, probably better than in any other country. I get 2-5% back on all of my purchases, which means that the credit card fees paid by the merchant aren't really "wasted" on the payment processers.