The reason Cointerra are dropping their price like a stone is they have yet to raise enough capital to fund NRE and they are expected to tape out imminently. You have to pay for your NRE upfront to receive your tape out results.
Nonsense. Their first preorder batch netted them some $14M:
http://thegenesisblock.com/cointerra-and-hashfast-sell-17m-of-bitcoin-miners-open-second-batch-sales/28nm mask sets dont grow on trees, but thats enough to fund at least half a dozen 28nm bitcoin miner designs and masksets.