Buyer power...if no good voucher then we don't simply spend our money. If the platform sales not good then they will start to give more higher value voucher. It's always supply-demand cycle. This happened in MXB AMXX card. MXB remove the cash back feature and many members start cancelling the card and eventually the bank have to revive the card cash back feature.

The other option is to search for other platform to hunt for a better purchase. I notice 11xx and Qxx10 still giving quite high value voucher.