I don't think "cool points" are lame at all. They might be funny, but not lame.
Ok you had for example 2455 cool points and in my opinion you lost like 670 cool points that have been deducted from your original amount.
"Lame" and "cool" are in the eyes of the beholder... <shrugs>
Of course who am I and my stupid points? Nobody. It is my opinion and it might be dumm, but if you let people have little ads then maybe your posts would be answered faster because more people would want to answer them.
I'd considered this several times, and ultimately I think people can best be served by others who are willing to help for the sake of helping.
Both models can work (i.e. the most popular webmaster forum online has much stricter rules on linking and no sigs are allowed at all) and I avoid the "sig motivation" model because I think it leads to having people here just to poach clients, and in the web dev topics it usually has meant that they offer only so much advice as to be recognized as an expert and then try to convert the helpee to a client.
It's not always the case, but it's a path we don't want to go down.
In any case, this is getting more and more off topic so I want to leave it at that.