Found this buried in a reddit thread with like 5 down votes.
https://www.youtube.com/watch?v=is5c...ature=youtu.be
Apparently you just use a proxy to buy the game with Russian currency and since the conversion rate is what it is you get the game for $28 USD for the $40 normal edition.
I just tried it on a U.S account and it won't let me since the account has purchased stuff via USD in the past. Since the youtube video guy was from EU I am assuming this might only work via EU. Let me know if you try.