SSF did have a point system way back when, it was such that the mods were able to give points to people who did a good and helpful job in the forum, but we canceled it.
Now, as majikman111 said, we have a warning point system, to keep track of bad behavior.
as for good behavior, be sure that all the staff is constantly talking about those people who contribute in all section and we are aware of everything that is going on, so we rarely miss someone who deserves a promotion or reward
allowing members to give each other good or bad credit is a bad idea, because we will have no idea why the credit was given, maybe someone dislikes another and gives them a negative point, maybe someone just asks friends to reward him with points, or worse, open another account just to reward himself - Too much cheating and misbehavior can result out of this.