An insane deal as it seems to stack so you get the sign up benefit + Covid return benefit if signing up before 20th September.
Here is the Covid deal: https://www.gmhba.com.au/campaigns/returnofsavings
Here is the signup deal which has previously been posted on Ozbargain: https://www.ozbargain.com.au/node/863079
Could be worth >$1000 of value to some people.
damn signing up asap