First off, let me state that these guys are bigger than the OTC.BB. Here in Houston TX, they have an actual office which is uncommon for OTC stocks. I will try to take a picture and post it on here for you guys to see.
Secondly, It is not uncommon for companies that are trading on the NASDAQ OTC exchange to get bought out. as far as all that Net present value calculation, you are totally long winded with it. It is simple. If a company has a patent or a 510k clearance to market a product that you need, If the dollars make sense, a smart corporation will execute the deal. Even with a marketcap of 500million, a company with a 25billion Market cap can easily partner with them and pay milestone payments in addition to an upfront payment.