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
I just have a id. 1/2.... A href id if that makes sense.
So it's the logs that see the number of iterations. Thousands on a couple of ips. Script kiddies.
Honestly I didn't think the black hole would work that well. But it reduces the actual traffic by a huge factor.