Noticed this deal mentioned in dealbot's recent post. Don't think anyone has posted it before.
The offer entitles any Amazon Australia Prime Member (free trial or paid) (Eligible Customer) to receive one $10 amazon.com.au gift card when they (in a single order) spend $39 or more on eligible items in their first purchase as a prime member on amazon.com.au using a Mastercard card issued in Australia.
"eligible items" refers to any item purchased on Amazon.com.au (via desktop, mobile browser or the Amazon Shopping App) but excludes digital purchases such as e-books, subscriptions such as Prime video and audible, gift wrapping and postage or delivery rates.
Eligible Customers who successfully redeem the offer will receive a confirmation email within 5 working days of their order being processed.
Gift Card will automatically be added to your account within 60 days after the promotion ends.
Offer is valid until 11:59PM (AEDT) on 25th November 2020.
As usual, click through Shopback (higher rates) or Cashrewards for further savings
seems like it would rule most existing members out.