The most important metric in current market is not power efficiency (Hash/J), but simply price per Hash/s. Sounds like you are far behind the competitors.
Another detail to note is that your professionally written call for partners is posted in a fucking internet forum. Any group of graduate students in Switzerland would be a better place to look for the solution you need, not to mention simple advertisement on a professional Website or in a journal, or even LinkedIn. I suspect this has got something to do with users of this forum having a proven competitive advantage compared to other groups I listed when it comes to sending advance payments to random story-tellers.
I think you've misunderstood what they're looking for. They're just making chips and won't be supplying anything to end users. They're looking for companies who want to get into the ASIC market without having to develop their own chips - how each company utilises those chips will determine which company's products offer the best value for end users. There'll basically be 3 or 4 companies designing their product around the same chip - just like many companies use Intel's chips for their products.
The advantage to the companies is that they're starting off with a 28 nm chip which will be improved upon over time and not having to pay the chip development costs. Smaller chips are one of the things which will inevitably happen with other ASIC developers, but not until they've recovered their R&D costs on their first generation and made a considerable profit to boot.
It's unlikely this is going to be the only B2B chip producer to enter the ASIC market. If these guys are for real, it signals the beginning of real competition in the ASIC market.