Hey TW,
Interesting question you have asked ? Many marketing companies use that same make up we all have as humans to sell their product (not that SCN needs to).
Its that need to be recognized by our peers and by those who we perceive as our betters. The points help us quantify that sense of self worth. As as example, replace points with money, after a certain point how much do you REALLY need, but we all want more so that we can add some bling to our lives and feel good. May be the points are that bling to our professional lives !
As a newcomer, I know that every little point increment makes me feel more confident, When I had my first correct answer I was so thrilled. Yes I knew something and was capable enough to help others solve a problem.
Just that need to boost our self worth, image, call it what you will in our own eyes.
regards,
Aziz