This deal is back (notice there's no activation deadline for the cashback, like CR does):
Shop via the App using Zip's single-use card to earn $19 cashback per eligible transaction. Starts: 2023-05-16 12:00AM (AEST) Ends: 2023-05-31 11:59PM (AEST) Reward Program T&Cs apply. The cashback offers are only valid for purchases of $30, $40, $200, and $300 SIMs. Any purchases of $2 and/or $10 SIMs will be declined within 5 business days. Offers are redeemable up to 5 times per customer. Terms apply.
‘The cashback offers are only valid for purchases of $30’?