I am on the $39 per month plan, and was just starting to run out of data. I phoned up and they gave me the bonus 1GB of extra data per month for new signups despite having been on that plan for approx 3 years. Glad that they are looking after me as my total monthly spend is apporx $198 PM. (Fibre, mobile, + other addons)
Just posting this to help balance out the threads that are about problems.