Flymining is in fact a best bitcoin mining rental contract. It is in fact an investment site. The fee of flymining is fixed. I am start my earning immediately after i made investment. And the most important is that its withdrawal is instant. This mining site does not hold your bitcoin. Do not worry about electricity . Its electricity is very cheap. Webcam live broadcast is another advantage of this site. So do not waste your time visit the site as soon as possible and earn good income.