It's for vBookie. I have it on my board... basically, bookies (admins, and maybe other designated people) can make threads with bets, place odds, and you can bet your vCash. So you can have like "Who will win the Cup?" and list odds for every team, and have people bet and such. It's fun.
You are not missing much, it was just bit of text under the post count in everyones profile, that read something like 'VCash:500'. I only noticed it out of the corner of my eye looking at someones profile. For a second, I thought that everybody in the thread had 500 posts until i actually payed attention to it.