As a Concierge member you get 20% off computers, tablets, mobiles, accessories and printers^ from 8pm AEST Sunday 25th June until 12pm AEST Monday 26th June 2017. This means 20% off the current ticket prices online.
Each Concierge member get's a unique code. Not sure if you can sign up now and get one for tonight.
Update: On again, July 23 & 24