imo no not at this time.

"Cloud" hashing or hash rental is pretty new in the market.  The only real reputable business doing it professionally is Cex.io (Ghash) and their price per GH/s is ~$6.6.  Which is insanely high.

Go calculate returns on any miner cals based on that cost per GH/s.

Right now people are saying $3-4 per GH/s is about the limit to make money with direct hardware mining.  With cloud hashing you don't have to worry about electricity, storage, cooling but is that worth paying 100% more for... no your ROI will be non-existent.

Other companies selling for less like pbmining.com are new and in many cases so far not transparent enough.  They seem to be paying out now but could be a ponzi where they pay you back slowly what you put in hopping to get a bigger pool of btc then close/disappear.   Even at hardware mining costs, the returns imo are not worth the investment or risk/gamble that these companies are legit... Maybe once a number of services proves themselves or provide more transparency (like farm data, company data).

Mining profits are pretty slim right now, the miner manufacturer's hold most the cards so they are already milking 80%+ of the revenue out of every device sold.  When happens when you put more men in the chain, each person gets their cut and as always its more then you think it should be:).