Just saw this tonight.
Myer currently have a promo where if you spend more than $75 in a transaction you get a $50 Zuji discount voucher (Discount is for International flights over $800)
http://www.myer.com.au/pdf/StocktakeCompT&C.pdf
There is also a competition to win a domestic holiday with Qantas each day worth $2500.
(BTW, if anyone does have a spare voucher, would love to know! Will be booking a couple of >$800 flights with Zuji shortly...)