So, Microsoft cares more about capturing the complete social graph of the software community than it does about direct revenue from an already not-very profitable (or perhaps not at all profitable?) acquisition. Got it.
Microsoft has both linkedin and github, meaning they have the social graph of the government, business and the technology spheres. That social graph is arguably even more valuable in terms of revenue opportunities than facebook's. Direct revenue of linkedin and github might as well be irrelevant.
So, what's their social graph play?