Dropsitenews published a list of websites Facebook uses to train its AI on. Multiple Lemmy instances are on the list as noticed by user BlueAEther
Hexbear is on there too. Also Facebook is very interested in people uploading their massive dongs to lemmynsfw.
Full article here.
Link to the full leaked list download: Meta leaked list pdf
Yeah ive seen the argument in blog posts that since they are not search engines they dont need to respect robots.txt. Its really stupid.
“No no guys you don’t understand, robots.txt actually means just search engines, it totally doesn’t imply all automated systems!!!”