Using a corporation's free offerings isn't freeloading. Microsoft wants people to put their code on GitHub. They want GitHub to be the place where source code is hosted, it is incredibly valuable. Saying "GitHub is sucking and I might leave" is information that Microsoft wants to know if they want to preserve GitHub's dominance.

Of course some people take it too far. Of course there are reasons that the outages are occurring. But Microsoft wants GitHub to be a core, reliable pillar of the software world. Nobody's making them do that, they do it because it's good for them.