Netyka, azureus a mnoho dalsich klientov ma vlastnu implementaciu bittorrent protokolu (protokol samotny licencovany nie je). Co sa tyka licencie, malware je licencia ukradnuta (ci zmeni zdrojaky priamo, alebo prida kod do klienta pouzivajuceho bittorent sdk).
Dodatok: vyzera to ze bittorrent protokol zostane aspon spatne kompatibilny (podla toho clanku). Niektore formulacie su zaujimave: "Developers who produce open source products will often have their product repackaged and redistributed by businesses with malicious intent."