No conspiracy here, I'm afraid. Many contributors have asked to withdraw their submissions and a lot of the submissions are more than a year old, so WotC is starting over from scratch, letting those writers who want to work with them contact them directly. As Chris Thomasson and I agreed the other day in email, this is probably how we should have done it in the first place.
--Erik Mona
Editor-in-Chief (still!)
Dragon Magazine