Wow I didn't see that. Usually it's forbidden in the terms of agreement between the merchant and the payment processor to add a surcharge for using the card so everyone else ends up subsidising it.

Vienna/Austria is such a strange place wrt payment right now. Some places are cashless, many are cash only, many are card only above a certain amount. I had one lady running a ramen restaurant accept instant SEPA.

And it's going to be interesting tax wise when they remove the requirement for receipts on transactions under 35 EUR.