I strongly suspect, but cannot prove, that Skype was also exfiltrating audio files from the clients PC at one time. When they opened their high-quality audio s

I strongly suspect, but cannot prove, that Skype was also exfiltrating audio files from the clients PC at one time. When they opened their high-quality audio service the songs had clear artifacts of having been encoded more than once. If you had access to the original uncompressed audio stream, you'd simply encode a higher quality version. Many albums weren't available for high quality streaming at all. The logical explanation was they didn't have a database of lossless audio from which to re-encode, and we already knew they were using P2P. Why not use the P2P to raid users music collections as well.