If you do the math on IceDrill shares, it comes out to about $14/Gh/s starting in November.

50 million shares at 0.0014btc each.
500Th/s worth of HashFast chips.

So, one share costs you $0.14, and gets you 10Mh/s, or $14 for 100 shares and 1Gh/s.

So, either HashFast is charging $14/Gh, or IceDrill is making a lot more profit off this deal then they're letting on. That's the problem with this NDA stuff, it makes it hard to evaluate various deals.

On the other hand Labcoin, which has their own chip, is offering ~520Th/s by December (Starting from 50Th in September). That comes out to about $3.50/Gh/s in December and about $36/Gh/s in September. Plus with labcoin you actually get a cut of the chip sales, instead of simply seeing the difficulty going up.