Three. Airbnb is an online platform that lets users reserve distinctive lodging all over the world. When the referee completes their first stay or experience, the app's referral program awards credits to both tmega slots gamehe referrer & the referee. 4. Cash App: Cash App is a peer-to-peer payment app for friends and family that lets users request, send, and receive money. When the referee uses the app to send their first payment, the app offers a referral program that rewards both the referrer and the referee with a cash bonus. These are just a few instances of refer-and-earn apps that provide businesses & users with enticing rewards.