Hey GreekTitan, welcome back.
I don't know what all the other reasons were, but after Ficwad went down for maintanience, I grew more used to Fanfiction.net and then, when Ficwad came back, it had actually deleted most of my reviews on all my stories and a few chapters. I'm a little nervous to trust this site, so that's why I decided to move to fanfiction. I still check here all the time, though :)
I do miss the nice way you could describe each chapter induvidually here, so I may be comming back with a story or two, but I'm scared to lose everything x3
As for the 'Fanfiction' movement, it was just that hardly anyone updates here anymore, and as it's been said, most everyone is on fanfiction since Ficwad was down and out for a while. The 'Movement' was just to try and get everyone together so that you wouldn't need to hunt around for stories, that's all.
Anyways, that's my two cents and I guess it is a little confusing, since Ficwad was huge in the begining, and now there's like no one here ):
-Demenior