Miaghstir: They did agree to AD&D games being sold here though, despite them seemingly wanting to make everyone forget that old editions of that ruleset ever existed as soon as a new one comes out.
AD&D is a system where you can tell a different stories. MTG is "just a card game" to play. There is no more TSR as a brand and name to gain $$$ from AD&D and for WotC AD&D is not "main" way to gain $$$. MTG is still mostly in the hands of WotC, and MTG is/was primary WotC job.
serpantino: considering another game on the license was released in 2009 with a lot of expansions & booster decks and one was released this week on steam... I doubt they'll want people buying the older one instead.
http://store.steampowered.com/app/49470/?snr=1_4_4__13 The main difference is: I think you can only customize some already created decks. You can not build your own deck yourself like in old and real MTG.