Just received an email that this deal is finally back !
However no mention of the $10 port-in credit in the banner :/ - hopefully someone can confirm this works
Promotion finishes on the 22nd of November
Edit: This plan includes Telstra's full 5G network access. Plan details here (Thanks FlyingKiwi!)
Finally got lucky with the $10 credit for the $69 ($99 less$30) plan I signed up for 3 weeks back with 150Gb data. I tried right after I signed up through chat and was unsuccessful. Then today I tried again and was again refused after being on chat and waiting for over an hour. This time around, the person checked, said will give me $5 for 6 months. I can chat again in 6 months and get $10 for the next 12 months. I said my contract is only for 12 months. Then the person just gave me $10 for 12 months. So as others has said, they will try to low ball you at first but you have to stay firm.