I am using two boosts 12 months prepaid 80GB package ($150 plan) - which are going to expire on March 7th and 8th respectively.
I received an SMS yesterday and today that a 40GB bonus will be applied if I recharge before the expiry date.
This might be a targeted offer (as confirmed by a few other existing users of $150 plan), most probably only to those with notable data left on their current Boost plan.
So basically 120GB data (instead of 80GB) for $150 recharge. It seems like a pretty good deal to me considering I was planning to port out and then port in to get Boost current bonus deal.