DiscountHero aims to detect and remove discount codes that are not eligible to certain customers - e.g. new customer promotion codes for existing customers.
When creating a discount code via the Shopify's settings, merchants can define if the discount should be
1. restricted to a specific customer group (customers who haven't purchased)
2. limited to one use per customers only
When our app detects non-eligible customers using discount codes that meet either one of these criteria, the discount will be removed.