This is pretty interesting! Spotify is not very happy that iOS customers have to pay an additional $3 for a premium subscription when it is purchased through the App Store. I myself started to upload all of my music to iTunes Match and at the same time, played around with Spotify. As I was going through my music, I noticed that most of the stuff I was about to upload to iTunes Match, could be found on Spotify so I pretty much gave up on iTunes Match. Oh and being a student, you only pay $4.99ish a month. Cannot be beat!
Check out the rest of this article over at The Verge. Definitely a good read!