Pretty risky, basically gambling with your money.
you mean investing? if someone would invest bitcoin in mining hardware no one could scam them
The risk is not actually profiting along with not recieving your hardware and getting scammed etc. Like the case with many mining companies they often cannot meet up to what they say about their hardware.
Not to mention... you're fighting Bitcoin's hash and value volatility like this, increasing risk further. If a mining company could make a profit, why would they sell YOU hash rate for LESS than they'd earn? The thought of this is ludicrous and is proof that the cloud mining sector is full of greedy people.