[akerro]

Yes, microsoft blocked a lot of features in days after takeover. Try searching for code being logged out.

[majewsky]

Code search has been restricted to logged-in users way before the MS takeover.

Proof: When searching "github code search login" on hn.algolia.com, it turns up this HN thread from September 2016, nearly 2 years before MS bought GitHub: https://news.ycombinator.com/item?id=12581068

[luma]

This particular repo was blocked well before the MS buyout. Whatever decision was made, it was GitHub not MS who made it.