It won't be 600% a year obviously, but genesis mining isn't a scam.
Not sure, where it comes from as I can't find "The Genesis Platinum Mining Contract 5000 GH" on their website and currently only monero mining contract which available.
And look at this:
Genesis has NOT sold BC mining for some time. Last time they did open up BC mining you paid now and waited months b4 it started
It's a true story as the last time they sold bitcoin mining contract but contract holders can't mine at that time instead of waiting for months.
Can genesis mining offer that high? I don't think any mining rentals can offer a 600% profit in just a week or so. The website says a 1000% ROI (not the genesis) for a week. I don't think its legitimate based on the offer they have.