I wonder when will we notice that a small handful of payment and card companies tax 2-5% on every single transaction we make with a card for... well... for what

I wonder when will we notice that a small handful of payment and card companies tax 2-5% on every single transaction we make with a card for... well... for what exactly? (Of course I'm just yelling at the clouds. There is no way to change it realistically. Not anymore.)