Konstantin Ryabitsev has written a blog post with
hard numbers about the impact of AI crawlers on the Linux kernel
repositories at git.kernel.org:

Today, git.kernel.org receives about 6M daily requests demanding to see
random commits. Of these, 66% are still immediately batted away with the Anubis
challenge, but 33% are now solving the math and getting through to the main site
- because apparently what we have to offer is worth spending a ton of cycles to
calculate the Anubis challenge.

It's impossible to tell with certainty which of these are bots and which are
real humans - but chances are, if it's asking for an old commit in a random old
fork, it's probably not a real developer trying to do their work.

With a bunch of generous assumptions, legitimate requests are only about 2%
of git.kernel.org traffic - everything else are scrapers.

https://lwn.net/Articles/1091203/
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