The only people who make money on cex.io are the ones who got in very early and the traders riding the price downwards while extracting value from price swings. Everyone else loses.
Actually, the ones that got in very early lost the most because cex.io shares are less over-priced now than they used to be. The only people that make money on cex.io shares are cex.io and some of the traders. Most of the traders and all of the miners lose.