Because I want GitHub to be agnostic and not pushing me towards anything?
This was always one of the core worries about GitHub and Microsoft. Microsoft will not leave GitHub alone. It's too important to developers, and no matter how much they say "we won't touch GitHub", nobody (rightfully) will believe them.
I always believed Microsoft saw GitHub as a potential "in" for millions of developers, rather than a product that could generate revenue.
This move doesn't worry me, as I'm sure Microsoft would look to do something easy to calm the nerves of people who worried about Microsoft's acquisition. The cynic in me sees this as sweetener for Microsoft's later moves to integrate GitHub with Microsoft's developer tools, which will infuriate me along with millions of other developers.
This was always one of the core worries about GitHub and Microsoft. Microsoft will not leave GitHub alone. It's too important to developers, and no matter how much they say "we won't touch GitHub", nobody (rightfully) will believe them.