This Wired article is a must-read for all who use GitHub, in any capacity.

It's true it has good APIs, and GIT by definition is all about exporting your data.

But even though all that's true, it's still dangerous to put all our source code there.

I did not know what happened to Sourceforge. They're now putting adware in the downloads. That's totally unacceptable, obviously. But when people take their projects off Sourceforge, they put them back, with the malware back in.

You think this can't happen to GitHub, okay. But at one time it was unthinkable that it would happen at SourceForge.

Read the Wired piece. If you read one thing today, this is the one you should read, esp if you depend on GitHub.