The bot situation on the internet is worse than you could imagine

Operators observed facebookexternalhit suddenly sending masked traffic, fbclids, and high-volume mobile API scraping.

Enabling Anubis at low difficulty reduced requests from hundreds of thousands to about 11 per day in the affected tar pit.

Reporters noted Amazonbot caused DoS-like load and that SHA-256 proof-of-work is trivial to bypass with optimized C or ASICs.