They tease you with those tracks to get you to buy the whole album.
When you buy a pre ordered album on itunes why do they let you download 2 of the tracks way before album release!? And then a few days later let you download another track!? It makes no sense!! it is like ordering a loaf of bread online, they break off a piece of the loaf and then say we'll send you the rest when it is available!! Imagine ordering a crate of coca cola in those original 50's style glass bottles, they send you 2 and say hey we'll give you the rest when they become available!
I once ordered an album on itunes a few years ago and I got to download the entire album when it came out! So why now in this day and age are apple breaking down a pre ordered album and sending out the bread crumbs!? The problem with any blue chip organisation is that new managers want new changes! And those new changes can benefit many but not the rest of them!
So far I have been charged for 2 tracks and recently itunes let me download another track so then does that mean I will be charged for that as well!? And what about the remaining tracks!? Will apple continue to break the album down and send me those tracks piece by piece like bread crumbs!?
I would be more than happy to just wait for the entire album to be released and not mess about with apples bread crumb policy!!!!
If it ain't broke then don't fix it!!