The FlyBuys.

I was very anti flybuys for years. I thought, I hate cards, I don't want my spending tracked. Well, I don't have to have a card because I just stuck the barcode on the back of my paywave card with sticky tape, and I figure when I pay with credit or eftpos my spending is tracked anyway.

Now I have actually started changing my spending because of flybuys. I use those vouchers for points when you spend a certain amount on fresh food. The amount is always carefully calibrated against my normal spending to raise it by a small amount. So one week I eat a lot veggies (spend $14 to get 175 points), the next week I stock up on cheese or meat. I CAN'T HELP MYSELF.