While I agree with the general gist of your comment, GitHub was entirely self-funded up until about a year ago or so. they didn't "get" funding, they made real money and reinvested it and grew.
Fine, bootstrapping jokers are my favorite kind of jokers. No offense intended. My point is it's just a small company with no SLA, express or implied. It could have been anybody with the same great idea, and just because they had a great idea doesn't make them automatically reliable enough to pin your infrastructure on.
