Temporary increase in the usual 5% discount to 10% (with a 1% credit card surcharge, so effectively a 9% discount), for Australian Unity health insurance members or others with with access to Aus Unity's rewards.
Expires 14 October (or until stocks last).
$500 cap on purchases per calendar month, so buy $500 in Sept and $500 in Oct for maximum bang for your buck.
Delivery may not be instantaneous (unlike a purchase via Cashrewards etc), but mine arrived within an hour of purchase.
They also have less common discounted e-gift cards like Amazon at 5%, IKEA at 5% and Coles at 4%, amongst others.