Really? I don't know what to think anymore. It wasn't but a month ago s5 hash was more expensive than today's s7. I mean I started to buy when I saw drop to 0.0012 or so, but it's been nothing but loosing from me. I have about 4ths, better said "I'm stucked with it " or be prepare to lose big time. I'm missing o a lot of things here...
If you bought your own S7 with the power supply for $2000 and electricity cost you 10 cents per kw, it would take you almost 6 months to get your investment back, if the bitcoin difficulty does not rise. (Which it will.) Plus you would have to hope your S7 doesn't break. Unfortunately, this is how Bitcoin mining has been for a while. The benefit that you are getting from Hashnest is that you do not have to worry about equipment breakdown, and you can readily sell your hash rather than have to worry about trying to pawn it off on e-bay once it starts to approach obsolescence.