How do you know they were not approached by these companies? I am not saying they were, but please provide proof of the your so called statement of fact. There could be all kinds of reasons why the companies you mentioned focused on these other 3D technologies. Also, we don't know that 3DIcon even came up on their searches or that they even did a search for CSpace? Again, you speak as if this is all fact, but it sounds more like personal conjecture.
Last summer, Victor Keen hinted at the possibility of the company getting acquired. Maybe a big name company, like Schott Defense or another, is or was interested in buying out 3DIcon for their CSPace technology once it matures. Yes, this is conjecture on my part, but the CEO himself indicated it was a possibility.