What a load of rubbish. Like Tiscali Broadband, you're being lied to in order to suck you in.
While your songs may be free, they're DRMd to hell. You have to keep going back and back again to the site to watch the adverts to keep them unlocked... kind of like a permanent payment.
Sure it's free? You're not free to do what you want with it, you know. You're tied to the site permanently in order to keep your music "free" - true "freedom" can only come with piracy, or the purchase of CDs.
I'm sticking to P2P and the iTunes Store.