Oh, that explains it! At the register back in September, I heard some kind of a 扣 in there, and I shrugged and replied 要扣, having no idea what I was getting into, and next thing I knew I had a small reduction in the price and no more points when the next credit card bill came around. I wondered why they only offered it to me that one time.
Is that an efficient use of points? Not that I accumulate much of them … I only had 140 or so.
Re: other points: I’ve accumulated plenty of points with a Citibank card over the years, and they’ve contributed to free airline tickets or upgrades. So if you’ve got a card, yes, you’re absolutely eligible for the perks. But my wife helped me get that card, and I have no idea if her help was just translation, or if there was also a bunch of co-signing and guarantor stuff.