And it wasn't just a temporary marketing promotion. I've used such a card for many years.
(It was issues by a big bank that had almost no presence in my country... so maybe they were eating the cost just to build up a bigger presence and potentially enter the country?)
https://usa.visa.com/dam/VCOM/download/merchants/visa-usa-in...
2% seems to be a local maximum of cashback cards. There's a lot of 2% cards, and only a handful above that.
Makes sense?