Easy Digital Download Points and Rewards extension allows you to reward your customers for purchases and other actions with points that can be redeemed for discounts on future purchases.

Demo
https://codecanyon.net/item/easy-digital-downloads-points-and-rewards/20786389

Download
https://www.filecad.com/eb2y/Easy-Digital-Downloads---Points-and-Rewards-v2.1.8.rar