I think why people still invest in cloud-mining sites is because they just want a passive income and don't work hard for it even if they already know here are other real ways to earn bitcoin. And i think all of us want that but it is not just the right thing to do. There is no such an easy way to earn bitcoin or real money.
if the person were smart enough to realize that it's just too good to be true then they would think it twice,there's no such investment which giving you high rates when you just sitting everyday in your house and call it passive income,it's 100% bullshit,hard work = good money,less work = poverty,that's the point