I made use of my first UnionPay offer at 99 Ranch. They're having a promotion of $10 off a $50 or more purchase currently. I saw an advertisement at my local 99 Ranch, but I could only find the promotion listed on the Chinese UnionPay website, not the English UnionPay website. Unlike most other card offers I've had this one only requires you to present the card at the time of payment. The cashier scanned a paper coupon to provide the discount. 99 Ranch's payment system also does support UnionPay natively with PBOCCARD, so I didn't have to swipe and run as a fallback transaction over the Discover network. I didn't try QuickPass, but I haven't had luck outside of Mainland China.