So, I’ve been working a bit on adding some of the iTunes free music I got a few years back, and I just wanted to confirm their release status. Since the “Single[s] of the Week” were initially released for free, I’m thinking Promotional, but I’m pretty sure you could buy them after they weren’t free anymore. In fact, there’s apparently a few still available on Apple Music, like Kelly Clarkson’s “Underneath the Tree”.
(I think the Microsoft music store even gave away full albums for a short time. Pretty sure that’s how I got Abba’s Greatest Hits and Kanye West’s Yeezus, I feel those would get Promotional releases as well?)