I'm trying out a customer rewards program on Ying Yu Jade. Now you can earn 1 point per dollar spend and then redeem your points for a coupon when you reach $5-10-25-50 thresholds.
There's a pop up sign up box on the left, lower corner. You can sign up there. Then you can get notifications of the points you earn with your credit card payment.
This is new for me, too, and I'm hoping it works good. I plan to add it to Jade Heaven, too.
Here's a suggestion for your first purchase to earn rewards