In the US, merchants spent years actually being forbidden (by the networks' merchant agreements, and even by law in some states) from adding a surcharge onto cr

In the US, merchants spent years actually being forbidden (by the networks' merchant agreements, and even by law in some states) from adding a surcharge onto credit card transactions. That's mostly gone now (although I think there are still a couple states that forbid them, Visa and MC at least allow a credit card surcharge or cash discount in their merchant agreements), but it's so normalized at this point that customers are unlikely to care that CC and cash transactions are the same price. So, if you're a merchant, you set your pricing to include your merchant fees and just take the extra profit on cash transactions.