And before that they posted their open source code to a centralized site that wasn't open source.
This is one of those things where of course it was going to happen. GitHub was VC funded, they were going to either exit to a big company or try to become one.
Eventually the bill was going to come due and everyone knew this. You can choose to rely on VC subsidized services but the risk is you are still dependent on them when they switch things up.