I've just been reading about the exclusive PSN features planned for early 2009 as well (just posted on the official blog), and I'm growing increasingly more convinced.
As for the sales: 20K seems pretty decent to me for an old game you can buy for cheaper in many shops. It adds up to a lot on money for little extra outlay for any party involved, which can only be a good thing from the perspective of seeing continual updates for the game.







