The Voucherify Android SDK by Rspective offers a coupon / voucher platform that can be integrated into existing Android applications (Android API level of 10). Use cases: promo code, loyalty coupons, vouchers and gifts, mobile apps
Play2Shop aims to be the "Ebates with Entertainment and Engagement." Play2Shop rewards gamers with points and pays shoppers with cash back that can both be used for discounts at over 1,000 retail partners. Additionally, the Play2Shop API enables game developers to join the Play2Shop community regardless of platform.
Shopify has replaced its legacy Discounts API with the New Price Rules API. The API keeps what worked from the Discounts API, and greatly enhances those features with more flexibility and capability. One and five Shopify sales includes a discount of some sort, and Shopify wants to capitalize.
Just months ago, Chirpify was known as the company that "turns tweets into transactions." Chirpify has now deemed such commerce "in-stream commerce" and CEO (Chris Teso) has an interesting outlook on the industry that he feels Chirpify leads.