Sorry I'm not sure if I understand the whole discussion, because I do not speak Russian, but I tried using Google for translation.

There is no conspiracy theory:

I bought the DS3, from my trusted reseller along with the other two games, but I picked the wrong version of DS3. They do not refund for those who bought games from another region.
I am a regular customer, then I got a discount on other games, and kept the DS3 only to give away.

As the 3rd rule, I understand that only some regions locks are allowed, and regions that are not listed are prohibited.

Region restricted gifts and keys are allowed for a select number of regions. If you have a gift or key for another region, it should not be posted at this time.

I don't found no rule that disqualifies my draw, but if anyone knows I'm out of community standards, please let me know and I'll fix

Смысл в том, что купив игру намного дешевле и раздав ее тут, он контрибуции (опыта так сказать) получит столько же, сколько получил бы за свой регион. Больше опыта - выше уровень - выше уровень - лучше игры в раздачах и народу в такие раздачи вступает меньше, так что шанс выиграть больше. Как-то так ;)