The EU caps all card interchange fees at 0.3% for credit cards and 0.2% for debit, which is an order of magnitude lower than some of the fees in the US.
That’s why you don’t see the same kinds of credit card deals in the EU compared to the US.
I think that there was a recent HN thread that linked to an article which argued that the credit card system of USA has the purpose of taking money from the poor and giving them to the rich, and the estimated amount of the money transferred in this way was huge.
The EU limits for card fees prevent this in Europe, which is very good.
Note that the caps were introduced because the EU already had widespread use of bank cards, but local schemes were being replaced with Mastercard/Visa debit - the caps were brought in to prevent the duopoly from profiteering. (Apple/Google pay also use Mastercard/Visa virtual cards in the EU.) Before the cap, credit cards had way higher fees and there were some reward cards, which led to merchants simply not accepting Mastercard/Visa. Local schemes included Mastercard-owned Maestro (used in Germany, The Netherlands and for some reason Brazil) but also local schemes like Belgium's Bancontact/MrCash. It's unfortunate some of those schemes didn't just merge and started competing in foreign countries as well.