Some feedbacks are good and some are bad, what you think of hashocean? they said they operate since 2012 without a single delay, but they dont expose their profile.
I'd love to see their payment history on blockchain since 2012. On the contrary, u may check the payment history of
www.cloudmining.website on blockchain since 2014 on
www.cloudmining.website/payments.php.
Even if they pay on a regular basis, it doesn't mean it's profitable. Cloud mining, by its nature, is not profitable. Even if they pay every day for years, you won't make a profit.
Payment also does not prove gear, which I find scary. One could send out amounts and say it was mined when infact it's just BTC shifted around and it's part of what you paid. I know this will be seen as directed twords one here, but I mean it as a blanket statement for all cloud sites. If they are not linked to hardware like hashnest, or have an official statement from a legit miner company I would never invest on the site.
And granted this will not protect everyone there are ones like Asic Miner that went belly up. But it does stop a heck of a lot of them if you go based on hardware.