Are these "true" IMAA events you are talking about? I've been to several local events in addition to my club's that are "Giant Scale" but not IMAA-sanctioned. In my opinion there is no need for IMAA any more, and I wouldn't pay the additional IMAA fee just to fly at an IMAA event. As far as "giant scale" events go, I haven't noticed much change in numbers. Everyone seems to get along too, no matter what they are flying.