From what I gather, in the future the credits are going to be used to "buy" other members virtual stuff like "beer" and "chicken." I'm no expert, but I beleive your credits are negative because you've only posted 26 times since Dec. 2007. If you post more often your credits will come back.
Hope this helped.
Last edited by Twix; 11-11-2008 at 02:27 PM.