Paper stamp cards work. Not perfectly. Not as well as they used to. But if you put a stamp card in front of a customer today, some of them will use it, come back, and redeem it. So if you're asking whether paper stamp cards are completely dead — no, they're not. But that's the wrong question. The right question is: what are they costing you that you can't see? The case for paper stamp cards They're cheap. They're familiar. Every customer over thirty has used one. There's no s