Based on the encyclopedic knowledge LLMs have of written works I assume all parties did the same. But I think there is a broader point to make here. Youtube was initially a ghost town (it started as a dating site) and it only got traction once people started uploading copyrighted TV shows to it. Google itself got big by indexing other people's data without compensation. Spotify's music library was also pirated in the early days. The contracts with the music labels came later. GPL violations by commercial products fits the theme also.

Companies aggressively protect their own intellectual property but have no qualms about violating the IP rights of others. Companies. Individuals have no such privilege. If you plug a laptop into a closet at MIT to download some scientific papers you forfeit your life.