The game itself is in retail in Russia and beta everywhere else. The reason for this is so they can finance the development of the game. So do not look down on it because it is labeled as "Closed BETA".
@Empty
The engine the game is running on was developed for this game specifically I believe.
As for the matchmaking system, they have fixed the issues that were occurring. I have submitted eGO to be a registered clan within world of tanks, and we do have an In-Game channel. At last count I believe we had approximately 40, if not more, members who play.
The In-Game channel is;
=(eGO)= EdgeGamers.org