it's not a loophole. there's no way they can do something like that without the blessing of the banks. whether the banks decide to backstab them later on is another question altogether
thanks for heightening the scrutiny of the Amaze card by DBS, since it's not a 'loophole'. you need to have a better undstd of how the card game works, not everyone will call hotline immediately asking for smth that will only be known when the points are awarded the following mth. those that play the game of cards will patiently wait for the points to award to test out the thing, but here you just want to know it immediately.
there's many things going on in the backend, especially via this amaze route it's slightly more challenging.