Genesis sells you power. I for example make around 3$ worth dash with 500MH/S at current difficulty. once peoole get the news that Dash is the most profitable to mine right now they will switch their GPU's . if the difficulty gets up my earnings will go down. so if i make 3% a day now I might only make 1$ in 6v months. here it's all about timing! how ever there are companies that sell you the equipment rather than renyting you the power. Bitclub network for example sells u the GPU (I have 2) i make about 1/3 odf what I mine with genesis. how ever my genesis contract is over in 2 yrs. my Bitclub GPU will run many more years.