They say it is at least one order of magnitude[1]; "our plan to increase GitHub’s capacity by 10X in October 2025 .. By February 2026, it was clear that we needed to design for a future that requires 30X today’s scale."

[1] https://github.blog/news-insights/company-news/an-update-on-...

I wouldn't be surprised. Have you not noticed the sheer volume of slop being posted everywhere these days? Almost all of that is hosted on Github. And some of those repos have insane commit frequencies.

If they're suffering the onslaught of ai slop, it's possible.