"Clearly, Interaxon, emotiv and Neursky all have teams of engineers and programmers, and are well funded. VOIS has.......? "
They have an innovative product. While the rest of the herd were following each other around designing multi sensor devices, VOIS went out and designed from the ground up. If it weren't for people like the engineers and programmers from VOIS we would still be stuck with technology equal to what we had during the tech boom in the late 90's.
Risk = Reward