Anyway, in case someone was interested it seems the code itself is cited as MIT, however it has a "when it becomes a Linux .ko it becomes GPLv2" clause https://github.com/NVIDIA/open-gpu-kernel-modules/blob/580.7... and they do go out of their way to say "lol, needs binary blobs" https://github.com/NVIDIA/open-gpu-kernel-modules/blob/580.7...
That XFree86.run has always struck me as "you're gonna what*?"