the problem with UOB's card cashback is that the bank has not been very transparent (and efficient) when it comes to such matters.
you usually only discover about certain transactions not qualified for cashback AFTER the quarter ends. So if you kena something strange in month 1, you have to wait until the end of month 3 before the bank post the cashback ($50/$100/$200) before you can get the bank to look into the matter. the same goes for the additional 5%/6.67% cashback for those selected merchants.
for the lack of transparency, it becomes the user's (us) work to calculate exactly what cashback we are supposed to get and to flag out issues with the bank when there are differences between what we should get and what the bank actually credited.
such trust issues have become a thorn with several service-based industries (banks, transport, etc.). the recent SimplyGo saga is also something like that.
so if we want to continue to get the cashbacks quarterly, we have no other way but to self-help by calculating the expected amounts and then write in to complain when something is amiss.
a few years ago, their customer service (for card related matters) was top notch. now, it's like
