Nice info. Two important points to be mentioned here...

1. When the price of ZEC is going down, the Global Solve Rate is going down as well. Hence, Cloud Mining at fixed rate remains profitable.

2. I made a cost comparison between Genesis-Mining & Zcash-Miner. Read it below...

At Genesis-Mining,
260 Sol/s for one year cost 2699 USD, i.e. 3.59 BTC at current Preev rate.
Therefore, 10 Sol/s for one year cost 3.59/26, i.e. 0.138 BTC.

At Zcash-Miner,
10 Sol/s for three months cost 0.0125 BTC.
Therefore, 10 Sol/s for one year cost 0.0125*4, i.e. 0.05 BTC.

Hence, Genesis-Mining.com costs 0.138/0.05, i.e. 2.76 times higher than Zcash-Miner.com.