Let's look at the USB miners.  if cost is $1.5 /GH, and they have .33 GH, then their cost is $.5. At .1 btc per USB, the revenue is ($12.5-.5= $12). $12 is 96% of $12.5.

Is my math right?  96% profit margin (ignoring shipping) on the USBs at .1 btc?

How many did they sell at 2 btc and 1 btc?

And if the blades are $15 to make, and sell for 4 btc ($500), then they have a profit margin of 97%.

I think my math must be wrong somewhere...

If all of this is true (I am doubting it myself), then even if they match Cointerra's vaporware prices of $3/GH, then they are still 50% profit margin.  The cost for Gen 2 might be less, as well.
No wonder FC is selling hardware instead of mining with it.  Mining isn't profitable enough!