I realize they need some sort of way to make money at cex.io to run things, but $0.001 maintenance fee per GH/s PER HOUR.. They just killed themselves :/
I agree - that's about 9% of your mining income per day? That's too much.
I think they would end up encouraging people to short sell in order to keep their average ghash per 24h as low as possible - maybe that's the point(?).