I think it’s just poor wording. It says they *released tracks that were* scraped from Spotify via BitTorrent. I think the punctuation and sentence structure is awkward. I think what they were *trying* to say was more along the lines of “they scraped millions of tracks from Spotify, and released them via BitTorrent.” Still not technically correct, because you don’t *release* things via BitTorrent. But it at least clarifies that the songs were first scraped, and then released via torrent.