You might as well just torrent an mp3. It will be higher quality and an actual song instead of a music video.
I honestly don't even buy the "but it's easier when you have no service" argument because every one of these streaming apps has a way to save songs for offline listening. You're saving yourself $10/month just to spend how many hours going through the songs you want, getting URLs, downloading them, then moving them onto your device. Then of course the hassle of music videos being different than the original song, or managing storage space on both PC and device.