I admit I play in a lot of contests when inactive, but i'm usually acive in at least one or two at the same time too...
I would probably be active in almost all of them, all the time, if it weren't for the fact that it's tighter and harder to move money these days than ever before.
I don't really want to wire 100-200 , twice a week, and start to risk being banned, when there are so few options available now days