Customers earn points on every order, for their reviews and when they create an account, then spend them as a discount. Here is the Loyalty points tab they see in My account, and a product page with its “Earn X points” message.

• By default 1 point per 1 € spent, and 100 points = 1 € off: every rate is yours.
• In the cart, “Use 1,000 points: −10 €” applies the discount in one click.
• Points are given back if an order is cancelled or refunded.
• The shop owner sees each customer’s balance in Users and can adjust it.