Most loyalty programs that succeed today use points, stamp cards, or a combination of both. This of course depends on your store type, brand, and customer base. Micro-rewards really help bring your customers back to your store.
Point system
Giving points — for example 10 points for every pound/euro/dollar spent — builds a balance for your members that they can redeem later with a coupon.
Adding coupons
After activating the point system, or if you simply want to give your customers occasional campaigns, you can add coupons that will appear in the POS and on your homepage.
Adding stamp cards
If you run a business where customers come back to buy the same products repeatedly, it can be beneficial to use a stamp card — for example giving every 6th cup of coffee or every 7th bag of dog food for free.
Common mistakes
The worst thing you can do is let customers leave your store without asking if they are a member. Identifying each purchase and rewarding customers with points or stamps is critical for your business. This allows you to collect data on your customers with GDPR/TCPA compliance, and puts you in a position where you can communicate with them 1:1 — instead of paying to reach them again through social media and other channels.
It costs 5-10 times more to acquire a new customer
than to retain an existing one.
(Inc.com)