CEX.IO and GHASH/IUO are the largest scammers in the world of pooled mining.
No they are not. In fact they are among the most trustworthy operators. To my knowledge, cex.io has complied perfectly with their contract, which is clearly defined and they have disclosed most the information I need from a company to be assured the contracts are backed by actual hashrate and will be complied with. If anything they gave you more than they promised as IIRC, they lowered maintenance fees not so long ago. They were under no obligation to do so.
Being honest and complying with a contract however, is a very different thing from being profitable. Their contracts trade on a open market and for a long time traded for
insanely high prices. Everyone with a clue would have told you that. But you can not blame the operator for those prices, they do not set them. You did. Nor can you blame cex.io for the inevitable and widely predicted collapse of that price. THat they currently pay out next to no dividend was completely predictable and predicted and a logical consequence of increased difficulty.
Here is the truth: selling mining hardware can be quite lucrative, but overall mining simply isnt. It cant be, its a zero sum game. Any company that offers you a mining contract that appears lucrative is most likely scamming you, or you are not reading the contract properly or you dont understand how mining works.
BTW, yes, clouminr.io is definitely a scam. Looks lucrative until they run with your money in the next few weeks. Check my signature for more info.