Targeted offer.
How to Claim
1. Activate before you spend
2. Shop online on the Special Gift Cards website
3. Pay with your eligible CommBank Debit Mastercard or credit Mastercard or StepPay
You can check your eligible cards in ComBank Yellow offer settings
4. Get cashback into your account, typically paid within 14 business days
Note that "Offer not eligible for gift card purchases for JB Hi-Fi and The Good Guys. Offer eligible for online payments only
See this on how to convert to Amazon gift cards