Maybe my memory is faulty, but I never remembered having to pay a surcharge to use a credit card. Now everywhere I go there are signs saying that there is a 2.5-3.5% surcharge to use a car (and others that say that there’s a 2.5-3.5% discount for using cash, I assume to get around wording)
The credit card companies have always tried to prevent merchants from doing this by inserting language prohibiting either credit card surcharges or cash discounts into the contract agreements with the merchants. Obviously, credit card companies want to make it easy and convenient for consumers to use their credit cards.
I can’t immediately find it, but at some point I think 10-15 years ago, some merchants sued the credit card companies over this, and they won a court ruling that said that the clauses forbidding cash discounts and surcharging are unenforceable. As a result, merchants are now free to do it, but there are various rules. And some state legislatures have started to get involved with regulating things.
A big part of it was the rise of credit card perks like cash back, supported by higher credit card fees. I gotta admit, why should the vendor be paying for our cash back?