To those who snapped up $1 sims or those with too much Telstra credit and not sure what to spend them with, here's a suggestion to get a good Steam game with a magazine to read.
Subscribe to PC Gamer UK (not US) via Play Store on your mobile phone and pay with your Telstra credits of course. This month, PC Gamer UK is giving away free Steam key for Total War Shogun 2 - Fall of the Samurai which is normally $39.99 USD ($9.99 USD currently, on sale).
Once you confirm your subscription via email, forward said email to the publisher of PC Gamer UK (details on the digitial magazine you'll get) and they'll email you with a Steam Key.
You get a good read gaming mag and a good game to boot.
You can just subscribe for a month just to get the Total War game or subscribe for a year for $49.99 which you can do now with Telstra credits. The freebies are not consistent - refer to their back issues for reference on what they give to subscribers.
The 14-day trial subscription will not work for this, of course.
Good gaming!