Head Tracking with Cliffs of Dover

[Stipe]

Please don't think I'm trolling or that I want to fight. I just want to learn and understand.
"They can defend any part of their code". Which part? What if they are trying to protect a piece of code that is essential for any head tracking software to work and that is generic or the basis of any code?
That's why i would like to see copyright proof of what they feel is theirs. At the end of the day, almost everyone can afford track ir. But for the quality not becouse it's the only option. I bought simped rudder pedals, again, becouse it's a quality product that will last me for years.