Our digital stamp cards work just like usual paper stamp cards, minus the paper (we like trees).
When a retailer has an in-app stamp card and you purchase a qualifying* item, you automatically receive a digital stamp on that card. Upon completing a stamp card, you will receive a reward in the form of a voucher, which is chosen by the retailer.
To find out more information about a specific stamp card, simply tap on the stamp card itself. This will tell you which products qualify for a stamp, as well as what the reward is.
*Qualifying items are chosen at the discretion of retailers. Stamps are not accrued when using free vouchers.