From everything I've read, this portal seems to be exclusive to Sunsuper which is now part of the Australian Retirement Trust. I've just signed up (for free), but there rewards page doesn't list Redeem Your Gift Card anyway on there. It's got Good Guys Commercial and JB Hi-Fi commercial portal among others, but no discounted gift cards.
Does anywhere here have access redeemyourgiftcard.com.au, and if so, how? Through what partner?
"Sign-ups temporarily paused" on the registration page
I have a valid account created years ago using the generic password available on Ozbargain. Haven't purchased any gift cards for about 12 months. Did buy a few before without any issues.