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 was being sarcastic. It just boggles me that people are surprised by this, it should be obvious that the Fediverse is an even better source of training material (in practical terms if not in volume) than Reddit and such because there are no API restrictions or big corporations willing to throw lawsuits around.
If you don’t want your posts and comments to be used to train AI then posting on the Fediverse is the very last thing you should be doing.