Because Microsoft owns github.

Even without them plugging LLMs into it, using it all as training data, sharing everything connected to it directly with the NSA, they could easily do a more standard enshittification of it.

Oh you have a free github account, you can do X amount of pulls and commits per month, otherwise, subscribe to GitHubPro for $5 a month.

Oh you host some software that's used to antagonize our corporate partners?

Even though its not actually illegal?

Poof, gone, just like when the credit card companies decided nsfw games are verbotten.