First of all, it is not 200 GHz. It is 200 GHs, i.e. 200 Giga Hash per Second. Payout is not a constant amount in any kind of mining. What u see in different mining calculators are just the ideal amount. Because of mining variance, possibility of mining that exact amount is very very low. This is true for all solo mining, pool mining or cloud mining. I'm seeing varying payout in cloudmining.website as well as PB mining & CEX.io.