Also, most sites have far more people viewing them than commenting on them. I'd read somewhere that if you have 6% of your users contributing, you're doing very well. Unfortunately I can't remember where I read it :(
I think its because of the number of users in the site, still growing but people are not inviting their friends much. THe more there are people in your network the better chances for you Quests and Discoveries to have more views and answers as well as comments!
