Going on from the recent repost of this deal which requires a paid membership.
Found something hidden in the comments - thanks to this comment
Make an account with Australian Retirement Trust (ART), sign up with your details (dont need to provide your TFN).
You can access JB HiFi straight away. Good Guys commercial requires registration and you need to provide your ART member number. Got approved within 1-2 hours even though it says a few days.
You can also sign up to Rest Superannuation and get instant access to The Good Guys Commercial portal with a validation code according to this comment on the same thread.
May I confirm doesn't an ART account cost money? Even if you have zero balance?