Well, I think they are asking them to pay for the DRM that Apple pioneered and uses (and let's be honest, Apple was the first to make this all feasable for legal sell of mp3's THEN the rest of the industry jumped on the bandwagon) so just like WMA's from MS they want to get paid for their intellectual property of the DRM code that takes place to insure that the mp3's are legal... and that's MS's goal also... just they would rather brag then be legit in this case.
I SEVERLY doubt that DVD rights have come down all that much since xbox 1 it was just a way for MS to cut cost... I don't have a problem with it... but it's contradictory to not say this is in similar fasion.