Because there isn't much happening there? And maybe that's good?!
"Scaling job two – looking good at work – up to a social network creates a new sort of venue: a non–office office, with thousands of bosses, none of them yours, all of them potentially watching."Interesting to consider the different social pressures at work on LinkedIn that aren't explicitly part of the service. (Sorry about the NYT paywall link—I'm trying to stop linking there.)