Every shop has the drawer. Open it and there are two hundred cards from the old scheme, half of them with three stamps, a few with nine, and a rubber stamp that has dried out. The card was meant to bring people back. Mostly it brought back the drawer.
The paper card leaks at four places. Each one is fixable, and only one of them needs software.
Leak one: the card never leaves the shop
A customer buys a coffee, you stamp a fresh card and hand it over with the change. They put it in a pocket. It goes through the wash, or it sits in the glovebox, or it was never taken at all because their hands were full. Ask your staff how many fresh cards they hand out in a week and how many come back. If the second number is under half the first, this is where your card leaks.
The fix on paper is to hand out fewer cards and make more of a moment of it: ask the customer if they want one, and if they do, write their name on it. On a mobile number, the fix is built in. The customer types their mobile once, confirms a code, and the card is the number. There is nothing to carry.
Leak two: the card is at home
A regular is on stamp seven. They come in on Thursday, order the usual, reach for the card and it is in the other jacket. You have two choices and both are bad. Stamp a new card from zero and the deal has reset for your best customer. Or say they can bring both next time, and now you are running a mental ledger of who owes who what. Either way the stamp did not happen, and a stamp that does not happen is the reward getting further away.
The stamp on a mobile number cannot be at home. The customer says their first name or the last three digits, you find the row and press Stamp. The card is wherever the customer is.
Leak three: the card is full and nobody notices
This is the one shops forget. A full card does nothing until it is handed over, and the moment it fills is usually a busy one. The barista stamps the tenth box, slides it back, and the customer walks out with a reward they will have to remember to claim. Some do. A surprising number do not, and a reward that is never claimed is a thank you that was never said.
Counter Club makes the full card impossible to miss. The press that reaches the target shows a reward code next to the button. You hand over the free coffee then, while they are standing there, and the card has already restarted. Nobody has to remember anything.
Leak four: you learn nothing
Paper tells you nothing about who your regulars are. You know faces and orders, but you do not know that forty people joined last month, that twelve are one stamp from a reward, or that the person who used to come daily has not been in since March. You cannot say anything to them, because you have no way to reach them.
A members list fixes the first half of that. You can see who joined and how far along they are. Campaigns fix the second half, on a paid plan: one message to everyone who joined and has not opted out. The regular who went quiet gets the same text as everyone else, and it is often enough.
The leak you should keep
There is one place a paper card is honest in a way software can pretend not to be: it is a small thing. A stamp card is not a database project. If a scheme gets so clever that staff have to explain it, customers stop joining. Keep the number of stamps short enough to reach, keep the reward something you would be glad to receive, and keep the rule simple enough to say in one breath.
That is why Counter Club is two fields and a button. Stamps to the reward, the reward, Stamp. Everything else, the code, the list, the opt-out, is there so the shop never has to think about it during the Saturday rush.
What to do this week
Count the cards in the drawer. Look at how many are over halfway. Those are regulars who were on their way to a reward and stopped. Then put a QR by the till, ask the next ten regulars to scan while their order is being made, and see how it feels to press a button instead of hunting for a stamp.