At the grocery store I go to, the cashiers typically ask if you have a loyalty-program card and if you don't, they offer to swipe their own so you can get the d

At the grocery store I go to, the cashiers typically ask if you have a loyalty-program card and if you don't, they offer to swipe their own so you can get the discount. I suspect that's not allowed by their employer, but I don't see much downside as a cash-paying customer.