[rodrodrod]

I think what jawns is getting at is precisely because you can't price-discriminate on the payment method, you might as well increase prices for everything in order to cover transaction fees (operating under the assumption that most customers will pay with credit card), which effectively means that cash-paying customers get stuck with those fees.

[opendais]

That is incorrect as of 2010 and was incorrect for several states before 2010. :/

[tesseract]

Agreed.