I don't think it is a good idea to invest in cloud mining these days, actually it always was very risky and difficult to get ROI, just look at the reports and listen to the recommendations. If you want to mine, at the current state perhaps the best idea is to buy equipment to mine altcoins.
Its not only risky but its not advisable because any cloud minning site to me is a potential HYIP no matter the promise made
In addition to their structure or whatever what they claim to justify their legitimacy because sooner or later they will turn to scam even the ones paying now dont have much the ability to go into the future.