PayPal Digital Gifts is offering 10% off on Uber gift cards in $25, $50, and $100 denominations. Additionally, PayPal Digital Gifts has been known to code at 5X on Chase Ink cards (though YMMV).
If you often use Uber, this can be a great way to save a few bucks. There is a limit of one per purchase, but you can likely purchase several. I’m not aware of a maximum, but purchases will eventually begin erroring out.
H/T: Doctor of Credit