So your argument is that because GitHub no longer has a profit motive and they're now releasing features at a much faster pace, that the acquisition has somehow gone bad?
They definitely have a competitive advantage where they're able to build and give away features for free to attract larger mind-share, but it's also the playbook of most large companies with freemium or gateway products. Not seeing why Microsoft needs to limit themselves to the same constraints as their less resourceful competitors.
It only benefits users in the short term. The consequences of monopoly catch up with all of us, eventually.
By the way, this is not just about Microsoft. Google, Amazon, and to a lesser degree Apple and Facebook are equally guilty of this.