Perhaps they give users the motivation to submit other interesting links like this one.
Thats why you have karma points. The original comment does not add any value.
I prefer real attention and praise to a number.
Well, they certainly don't when the ensuing argument buries the valuable thread in question!
Lots of good book recommendations below, folks. Keep scrolling.
My comment provides no less value than yours. Anywho, friends?
In my comment I offered a clarification/suggestion on how you can use karma points to show your appreciation for a link you like. Your comment did not add any value.