Similar to this deal https://www.ozbargain.com.au/node/817665
Maximum value is to purchase a $200 gift card.
I used it to buy a Super Shopper gift card, and used it to get a Wish gift card. With the 5% discount for NSW Seniors, it cost me $180 for a $210.52 gift card, i.e. 14.5% total discount for my groceries at Woolies.
Has anyone received the $20 credit from amex yet?