I think it is spoof-resistant from the sound of it? You giving a valid proof-of-region via one of their circuit designs provides proof of your region but does not give your exact location, from the sounds of it.
I'll get back to you after I've read through it.
That would be innovation, which I'm convinced no company can do anymore.
It feels like I learn that one of our modern innovations was already thought up and written down into a book in the 1950s, and just wasn't possible at that time due to some limitation in memory, precision, or some other metric. All we did was do 5 decades of marginal improvement to get to it, while not innovating much at all.