We sell the specialized hardware it runs on. We support it. We write it. We provide closed-source applications (the real heart of it) that run on the open OS.
Ok, I'm puzzled. I'm trying to picture what your product is if it only runs on Linux, on proprietary hardware, it "converts protocols" and its the leader in its field.
Freep mail me if youd don't want to "broadcast" it. (Believe me, I understand...)
It sounds like we work in similar industries