https://www.tomshardware.com/tech-industry/artificial-intelligence/meta-staff-torrented-nearly-82tb-of-pirated-books-for-ai-training-court-records-reveal-copyright-violations

"Court records reveal that the social media company used pirated torrents to download 81.7TB of data from shadow libraries including Anna’s Archive, Z-Library, and LibGen. It then used this information to train its AI models."