https://torrentfreak.com/spotifys-beta-used-pirate-mp3-files...
Funky quote:
> Rumors that early versions of Spotify used ‘pirate’ MP3s have been floating around the Internet for years. People who had access to the service in the beginning later reported downloading tracks that contained ‘Scene’ labeling, tags, and formats, which are the tell-tale signs that content hadn’t been obtained officially.
https://www.forbes.com/2009/08/04/online-anime-video-technol...
https://venturebeat.com/business/crunchyroll-for-pirated-ani...
My theory is that once they saw how much traffic they were getting, they realized how big of a market (subbed/dubbed) anime was.