Annex Cloud - Reward customers for completing traditional actions such as purchasing, as well as for taking...
Voucherify - API-first Promotion Engine for promotions & loyalty.
Swagbucks - Swagbucks is a loyalty program that offers individuals rewards for engaging in various activities. Users can earn reward points for performing Internet searches, purchasing items from affiliated vendors, or completing polls.
Goody - All products under $10 including free global shipping
Influitive - Influitive helps companies increase customer lifetime value and accelerate sales with the power of their own customer advocates. Inspire your customers to stay longer, share their experiences, and attract new business.
Dealyze - Custom Loyalty Programs for any Store (YC)