This is what I was thinking also (though you articulated it much better than I would have). A large company doesn't make an acquisition like this without a bus

This is what I was thinking also (though you articulated it much better than I would have). A large company doesn't make an acquisition like this without a business incentive. For them, it's driving people to their products. Maybe making the tooling in github for interacting with microsoft-y products a little bit better. Maybe adding whatever licenses microsoft likes to the front of the default licenses you can pick from when you create a new repo. Things generated by their editors going into your .gitignore by default. I don't see any reason they'd acquire github and then entirely leave it alone.