It's frustrating that every announcement for a new security feature that includes the word "GitHub" immediately gets swarmed by comments and conspiracy theories about GitHub.
I'm an anti-monopolist and want there to be a multitude of ways we build open source software, but I believe security features are different: mostly because they are either enabled by default or largely ignored.
GitHub is important to support because it's where 84% (372,841 / 440,821) of Python packages on PyPI are built.