Why not? What does it have to do with the cashier's paycheck? You think they are on commission? Ridiculous.
I've had stores turn me down for using a credit card because of a too-small purchase twice in my life, both times I said forget it and walked out. They don't want my money, I'll go away. Simple. Why should I have to shop somewhere when I don't like the policies? That makes me a "world-class prick". Do you even know what "world-class" implies? Utterly ridiculous. The blood has literally drained from my face because of the idiotic implications in your post.
Haven't even tried Apple Pay, yet. Haven't even tried setting up my CU bankcard, I doubt it works, yet. S'pose I could try.