I would advise against any kind of cloudmining or other hosted mining, the "contract" or terms can change at any time, the place could go up in smoke, the hoster could run with all the funds, etcetc, there are So Many Things that can go wrong, and the return is Very low.

Think about it this way, if the seller of the hosted hashrate, is selling hashrate, that means that you are likely paying More than it's actually worth, otherwise, why wouldn't he just keep the hashrate all to himself?
Cloudhashers make extra profit off their hashrate by charging more than it's worth, because people without a decent amount of starting capital can't afford an Actual peice of mining hardware.

Just my input