Uber: If users encourage their friends to download the app, Uber will give them free rides as part of its refer and earn program. 2. . Airbnb: By encouraging friends to book lodging on the website, users can earn travel credits through Airbnb'sslots no deposit referral program. 3. Cash App: Cash App provides a referral program in which users can get paid in cash for introducing friends to download the app and complete qualifying transactions. In 4. Robinhood: Users who recommend friends to sign up for the investing app on Robinhood can earn free stocks through the refer and earn program. 5. . Rakuten: Users who refer friends to sign up for the cashback shopping platform can receive cash rewards from Rakuten through their referral program.