This is pretty self explanatory on Commbank Yellow.
Pay with your eligible Commbank debit Mastercard or credit Mastercard or StepPay and tap select or credit
Get cashback into your account, typically paid within 14 business days.
Another deal on similar lines
Get $10 cashback when you spend $50 or more at Kogan.com
Do you need to have a transaction account (as opposed to just a credit card) to get Yello offers?