propaply not, since I am not sure if I would have looked into it. Without any money involved I would surely not use it to this extend. Like you said it is still very motivating to recieve one big upvote or having the hope to recieve one ;-)
It is still a great community and because everbody wants to get upvotes everybody behaves nice and civil.
You are right. People are nice here, and if it weren't for the money factor it could go savage :)