It's not open source. The license specifically states that they can revoke your license at any time. Thus there is no point to touching the code, only looking at it. With the wording the way it is, it is folly to touch the code given they can yank the leash at any time.
If thats true it looks a little dangerous.
You could spend years developing a game with Nvidia's open source code and suddenly they turn and say "nah... we changed our mind, you can't use any of it now"
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