The deal is on again for Good Guys Concierge Members. Last time, it lasted only a couple of days.
10% off Wish physical giftcards for $250 & $500 denominations.
Note that it takes 6 weeks or more for the gift cards to be received. (I'm still waiting for the ones I ordered in early September.)
Link to last time it was on:
https://www.ozbargain.com.au/node/482955
I have been waiting since 2 August for mine and still have not received them.