Comment by TheDong

anubis only works against lazy scrapers, and at a cost to your users. I'd prefer people not use it.

Bot traffic comes from machines that usually have a lot of idle cpu (since they're largely blocked on network IO as they scrape a bunch of sites in parallel), so they can trivially solve the anubis "proof of work" challenge, save the cookie, and then not solve it again for that site.

The only reason scrapers don't solve it is if the developers were too lazy to implement it... and modern scrapers also do, codeberg stopped using anubis because modern scrapers were updated to solve it.

The "proof of work" has to be easy or else people on old cell phones couldn't access your site (since an old android phone would start to overheat and throttle trying to solve a challenge that would take a modern server even several seconds), and it also consumes your cell-phone user's batteries, which is a really precious resource for them compared to the idle cpu on a server.