They also didn’t seed,
Supposedly, Meta tried to conceal the seeding by not using Facebook servers while downloading the dataset to “avoid” the “risk” of anyone “tracing back the seeder/downloader” from Facebook servers, an internal message from Meta researcher Frank Zhang said, while describing the work as in “stealth mode.” Meta also allegedly modified settings “so that the smallest amount of seeding possible could occur,” a Meta executive in charge of project management, Michael Clark, said in a deposition.
I’m not sure why you are so worried about this. I am saying that this does not happen anymore, but there was a time when there were lawsuits against infringers that were in the range of $10k-$20k per infringement. Apologies that I don’t know the ins and outs of civil law.