Stores have tried it. Customers hate it. Chiefly because many people simply don't carry any coins on them. You can't have all of your store's registers set to card only mode (yes this is very common for some reason) and then expect people to have a coin on them at all times, so they don't bother.

It also seems trivially easy to circumvent. Easier than remembering to bring a quarter with you when you go to the store.

[–] morgunkorn@discuss.tchncs.de 1 points 10 months ago

Yeah in a cashless society things like that can't work well. In Germany cash is king, you can't go out without. In France it is mandated that shops accept at least 2 means of payments (among cash, card, check or wire transfer), and only cash and cards have enough safety and speed that shops and restaurants want to use it.