Airbnb is a well-known Refer Earn App that allows users to book lodging all over the world. If a user invites friends or family to download the app & book rummy 51 bonus 2023their first stay, Airbnb will give them travel credits. Airbnb has found that using this tactic to draw in more users and boost bookings on their site has been successful. Not only that, but successful referral programs run by food delivery apps like DoorDash and Grubhub pay users for referring new clients.