Freebird is an app that offers Uber users the ability to earn rewards by visiting specific retailers, restaurants or bars. The idea is that businesses can pay Freebird to advertise their business on the app, when a user takes an Uber to that particular store they receive a credit for doing so. Businesses can also provide a reward if users make specific purchases. I did a poor job of explaining that, so it might make more sense to watch this video.
You can refer friends to Freebird, when doing so the person signing up will receive $10 and so will the person doing the referring. Please do not share your links in the comments on this post. Instead you can share them in this linked post, but please make sure to follow the rules.
I like the idea of this app, especially when it comes to bars and trying to discourage people driving. How useful this is will obviously depend on the options in your area but might be worth it for some.