Basically, my basis for this idea is that I think (in life aswell as in forums etc) that an official 'thankyou' is extremely underused.
E.g. at work, for 5 e thankyou's, we recieve a money reward. Problem is, people only say thank you in email because they are too lazy to do it officially.
I just think being able to see how many times someone has thanked could encourage the use of 'thanks' on posts.
Maybe im talking ****, i dont know, just an idea.