It only takes few bad apples to ruin everything. Since MS involves many spilt payment, I come across dozens of time where the cashier hit the wrong key and put in cash instead. I ALWAYS point it out to them, and restart the transaction. Thats how you keep this hustle going, and not burn a store. If not that, it’s just bad karma and you ruining someone’s livelihood over your little hustle is something I couldn’t live with. Do better.