Visa Local Offers is offering "Uber Credits" for opting in to their program via the Uber App. The program is simple, any Visa credit card that is registered to your Uber account is eligible to receive Uber Credits in addition to your normal credit card reward points per ThePointsGuy. The Uber Credits can be used on Uber trips.
1. Load Uber
3.Scroll to Rewards
4. Click on Visa Local Offers
5. Opt in
An example of the rewards in my area (Sacramento, CA)
10% back at Walgreens
10% back at Staples
10% back at Regal Cinemas
There was a thread on this earlier in the month, but the thread states it was New York City specific.
Update: Appears to be YMMV. Confirmed working in Sacramento, Bay Area, Austin Tx and Phoenix