I just spoke with JB-Hifi today about Telstra 5G plans. In-store, the $500 gift card offer on the $69 plan is back for today only (normally $300).
[edit] I can confirm that the offer is active, just went to the store and did it myself.
They also offer the $99 150gb 24-month plan with $1200 gift card, but that’s no deal from me.
$10 porting credit is still possible according to some comments below such as this and this.
It is possible to sign up this even if you have not ported out of Telstra for more than 30 days according to danlmoore and tryonthis.
Which store is this?