So the reason why I left Cex, is because I don't trust them to add hashpower to the market efficiently in a way that has a minimal effect on the price. They could be as clumsy as adding 5TH/s and dumping it all onto the market at once causing the price to crash, or they could be smarter and dribble it in over time. You just don't know, but I guarantee they are not as smart or as experienced as the traders in a commodities market.
This is a very intelligent way to look at it.
The only way that Cex could actually function as a real futures market is if there weren't a monopoly commodity seller.
The fact that Cex themselves are the only entity that can put tradable GH/s on the market makes the whole thing a nightmare. It would actually be amazing if there were some standardized way developed that people could provably put their own GH/s on a market like that, a system like that would actually function like a real commodity market.