that soundtrack looks really nice.... i'm debating if i should pre-order or not.
Gamestop would tell you that a pre-order is always a good idea, because it helps them gauge how much they should invest in getting additional copies at a store. On small releases, they may get a copy or 2, but when someone pre-orders the game, they also see fit to order an additional one; so your interest directly effects how findable the game will be in your location, at least to some degree.
I don't think Amazon really... cares... The only type of bonus you can offer there, is to help it rank up in the "anticipated games" ranks, which will give it more publicity.
So, preordering helps contribute to the games hype and availability. So nothing to lose, everything to gain!
They should sell the ASTs as downloadable content that you can add to the game and play with.
It's very likely that's a reason WHY they're offering OST rather than AST. SNKP did sell musical remixes for XII. And XIII already has some nice inclusions from various soundtracks. The ability to get even more ASTs for every team would be very nice, or just new remixes in general.
I wouldn't mind this, really. KoF music is worth paying some extra for, as long as it's for EVERY team (and bonus teamless chara) in the game, and not broken up to over-priced mini downloads.