They do that now, it's called pre-ordering a game with exclusive DLC. Then a few months later they release all the exclusive DLC for download. Look at FFXIII-2, all the pre-order bonuses are now just available for downloads for a price.
that doesn't mean its an okay practice. if its stated to be exclusive it should be exclusive.

I suggest a Camembert to go with that whine.
I don't have a TT and i don't care who has one. the OP is the one who needs the right kind of cheese.

It shouldn't matter. These games are to be enjoyed to their fullest why punish people who play to collect because for the above reasons. They are bringing back other items that used to be only gotten one way.
If you play to collect you should have been watching for stuff like this when it came out.

Heaven forbid an item promised as exclusive actually stays exclusive.