I wouldn't suggest you to invest at cloud mining at all. I loved cloud mining at cex.io a few years ago and I've actually got a ROI without practically investing anything but now even they've stopped selling hashrates, they're just too unprofitable, and I've tried looking at cloud mining again and could't find the legit one or the one where you could actually profit from.
Yeah I remember when CEX.IO was profitable.
S7 antminer's on hashnest are still profitable.
At least on hashnest you can sell your gh/s at any time; to take out your capital.
I started with $650 in March and now I'm up to 21,000 gh/s
Over $400 per month if I don't sell my gh/s
$2945 if I sell all my gh/s
In CDN dollars.