I can only see these type of services to be profitable if you A). Buy the hash from them during a promotional price at a 20-35% discount from what they normally offer the same amount for alot more then what they are worth. B). You buy from someone their hash at aleast 50-65% off because they are just tired of it and waiting this long (200 days! ) just to break even with what you paid for it and start to turn a profit after that time.
That is over half a year (120 days) for you to start to see anything being made back until your contract you bought is over.

And you also have to consider the fees you will pay to even withdraw from the hash account to your own bitcoin wallet. That does calculate into your profits and does put a dent into the amount you paid for it from the very start.