Basically, author would like the people to work 100% of the time (and for free). Or alternatively, author is surprised that programmers who enjoys statistics and pursue a BS in Biochemistry can be also interested in politics, world and like to share thoughts about those.

The puzzle would be sold if he stopped to think about comments as "contribution" and treated them as what they are - something to do during 10 minutes break, change of pace, communication for those who are lonely.