I'm more likely to spend more at any business if I can use the credit card without paying more than those that pay by cash. I spend less when I pay by cash and I'm less likely to go to any business that charges more if you pay by credit. Even I do go to those businesses, I'll pay cash but buy way less than I would if I could buy with credit without paying more. These businesses think they're saving $ but they're really just losing customers all over a credit card fee. Really not wise!