Punch.
Buy 9, get the 10th free

The closer you get,
the harder you push.

Set up a digital loyalty card: how many stamps, what the reward is, and — optionally — give new customers a head start. A real 2006 cafe study found pre-stamped cards get finished faster than blank ones requiring the exact same number of purchases.

Try 2 on a 10-stamp card to test the headstart effect from the research.

Runs on Stripe test mode.