I have spoken numerous times about digital game sales price gouging in the Australian market and GMG in probably the nicest gesture since GOGs gaming equaliser, has surprised the community once more:
From Games.on.net: Green Man Gaming takes one for the team. 
Since being pressured by 2K Games into raising the price on Borderlands 2 and XCOM: Enemy Unknown for ANZ customers, Green Man Gaming haven’t been sitting quietly on their hands. Their solution: a voucher that gives 30% off on all titles where publishers have forced them to gouge Australians unfairly.
We have thought long and hard about the ANZ market that has been so good to GMG in the past and what our approach should be,â€ said Green Man to us last night. We value our loyal customers in Australia and New Zealand and, as such, GMG are taking the hit so that we can offer the value you have come to expect from us.
That’s right: with the code GMGAU-3J9MF-MUINW, you can get 30% off the price of Borderlands 2, now down to $50 (and its DLC Season Pass, now $28), Mr. Torgue’s Campaign of Carnage (down to $11), Captain Scarlett and her Pirate’s Booty (down to $11), Spec Ops: The Line (down to $21), Civilization V: Gods & Kings (down to $36), XCOM: Enemy Unknown (down to $50), and NBA 2K13 (down to $36).
This code is valid for the next 10 years although GMG warn us this may be subject to change, but that’s the plan at last. Remember, this 30% off voucher is only valid on price-gouged titles such as the ones above.