So it's a semantics argument about the difference between "purchased" and "own". I guess they could have implemented a whole new category of item in their serv

So it's a semantics argument about the difference between "purchased" and "own". I guess they could have implemented a whole new category of item in their service (owned, but not purchased) or they could just set the effective price to 0.00, or they could add it to everyone's purchased list. Net result is basically the same, except that they made a big deal about the whole "getting it in 5 seconds" thing as part of the keynote. I imagine it might have been a bit (more) underwhelming if the "one more thing" announcement was that they were making an album available for free for a bit when their wider point was supposed to be simultaneously demonstrating their delivery capability, reach, and - appreciated or not - largesse.