[greedo]

Uh, despite the best attempts of credit card companies to hide the fact, their card processing fees do raise the price of gasoline. Before they held as much power over gas retailers, gas stations used to list a cash price and a credit price. The cash price was usually around a nickel cheaper. But now the merchant card agreements prevent having dual pricing (though some businesses try to get away with dual pricing).

[NoSorryCannot]

I think we only care about the presentation of fees to consumers assessed separately from the advertised price. Countless costs of doing business (and markup) are built into the advertised price. At least it is very simple for the consumer to compare prices.

A per-transaction credit card fee doesn't raise the unit price. Getting hung up on the evolving details of gas stations and credit card processing isn't the point.