The listing, Game Miner Invitation Code has ended.
Game Miner is one of a wave of new sites that allow people to give away games - www.steamgifts.com , www.galagiveaways.com , www.playblink.com , and now www.gameminer.net , which is the English version of www.gameminer.ru . The odds of winning anything are varied and rare, but you can win a few things here and there - I've picked up a few things on all of them, and people do give away games. Best thing I can tell you is take a look and you can only enter with an invitation code that i can provide