10,000 gold is a ridiculous amount to spend. 500 would be plenty. However, I don't think many will play this mode, considering the randomness of getting on a good team. The reason this works in games like CoD is because there are no teams.
It was an idea, but I doubt it would work, I'd rather have money being spent keeping the existing servers online rather than needing another 2 servers (1 for NA and 1 for EU). Before you say, what if we put this in existing servers, keep in mind that new players will be unable to play anything besides Rageball and Defend the Virgin. Not to mention that not a lot of people actually would want to play this.