OMG. This is the first a project that I have seen, very bombastic.
It's crazy 18 BTC/ZEC

amazing!
Price wont hold there. Better mine for short term, say 4 months at
www.Zcash-Miner.com. Rates are still reasonable @ 0.0125 BTC/hash/s.
I have 100 hash/s with them and have mined ~0.005 Zec so far. Is this good?
in what time frame? you should do 0.015 a day with 100h/s
if 1 hash is 0.0125 that thing is a scam, you are paying 1.25 btc to mine 0.015 zcash a day, which are worth only 0.075
Well, difficulty is climbing all the way, so I don't think we can make calculations on a whole day. As for me, I count on what I earn on an hourly basis. I have around 60 Sol/s, and for now I earn 0,00026407 ZEC per hour with that. What do you think of that ?
True. It varies a lot because of quick difficulty adjustment and calculation is pretty difficult in slow start mining period. Things will stabilize from December 1.