Seems like AGL rewards has this 15% off limited time offer for the Active Gift Card and 10% for the Baby eGift Card. Maximum daily limit is $500 and monthly limit is $500 for each card.
Participating retailers can be seen here: https://thecardnetwork.com.au/pages/the-active-card
Active card: For a limited time save 15% off when you purchase online. Redeemable at Adidas, Billabong, Camping World, Compleat Angler, Drummond Golf, Foot Locker, Giant, INTERSPORT, Merrell, New Balance, Nike, Puma, Quicksilver, Scooter Hut, Sports Power, Surf Dive n Ski, The Athlete's Foot. For a list of all participating retailers and redemption methods please click here. Hurry, offer ends midninght 10/10/20. EFT payments must be made no later than the 9/10/20. At the end of the promotion the discount will return to 10%.