The convenience to ownself is an important consideration on which combi of card + bank account (with bonus interest) to use .... should not just chase after the best deal ....Lazy to change my salary account. And My house nearby supermarket only got ShengSiong, so I Use BOC ShengSiong card spending each month easily 1K+ in ShengSiong for 6% Sheng Siong rebate. UOB one card max got 3.33% rebate plus a lot of restrictions