Because GitHub is incredibly reliable, it'd take more than zero effort to move it, and I'd lose whatever small community I've already built up around it.

This is like asking "Why are you still using Facebook" and you'll get very similar answers.

The company i work for is adopting github in lieu of a solution hosted in our datacenters.

We've had more downtime with github than without. So I'd take the "reliable" with a grain of salt.

Exactly. Github is the Facebook of code hosting. It's the place where you can make money and that's why people use it: some form of eventual profit motive. Weather actual money or just as a resume.