The economic incentive is simple: open-sourcing the driver will allow an open-source API to interact with the hardware, allowing AMD/other competitors to support the same API. So instead of competing at the silicon level, Nvidia chooses to set up unnecessary barriers to entry at massive cost to developers/users.
unnecessary? not in the eyes of the shareholders. just compare NVIDIAs stock surge with the performance of AMD. they protect their market and they do it pretty well.
the Linus video is awesome though :-) And I totally understand his sentiment
Like Torvalds says [1]: Fuck You, Nvidia.
[1]: https://www.youtube.com/watch?v=iYWzMvlj2RQ