Thats a gift card, you need to load money onto those, if you just take them and run then you might as well be taking a plastic bag. Without the cashier to help you its literally just a plastic card
oh you have the skills to work an electronic cashier now? You know how to load money onto a gift card? And you plan to stand there at the register loading it on while theres an active shooter? It would take you at least 30 seconds to get it right. Youd be riddled with bullets my guy