The issue is the insane amount of traffic from crawlers that DDOS websites.
For example: https://drewdevault.com/2025/03/17/2025-03-17-Stop-externali...
> [...] Now it’s LLMs. If you think these crawlers respect robots.txt then you are several assumptions of good faith removed from reality. These bots crawl everything they can find, robots.txt be damned, including expensive endpoints like git blame, every page of every git log, and every commit in every repo, and they do so using random User-Agents that overlap with end-users and come from tens of thousands of IP addresses – mostly residential, in unrelated subnets, each one making no more than one HTTP request over any time period we tried to measure – actively and maliciously adapting and blending in with end-user traffic and avoiding attempts to characterize their behavior or block their traffic.
The linux kernel has also been dealing with it AFAIK. Apparently it's not so easy to deal with, because these ai scrapers pull a lot of tricks to anonymize themselves.