I live in Germany and the problem is, people (cashiers) still haven't understood that they don't have to pay a minimum fixed amount (like €2) to the bank, like you have to do with Visa. That's why shops require you purchase stuff for usually at least €10 or look at you weirdly if you want to pay by card for a €2 hamburger at McDonalds. Which of course makes no sense, because they have to pay a percentage, not a fixed amount.

It's frustrating.

(Paying a fixed amount to the bank was a thing in Germany like 10 or 20 years ago.)