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I would patiently beg everyone to employ some basic reasoning. Situation A: React is licensed under BSD + PATENTS. You sue Facebook for infringing your widget patent. Turns out Facebook has a patent for something in react. They revoke your grant and counter sue you for infringing that patent. Long legal battle ensues. Situation A: React is licensed under just BSD. You sue Facebook for infringing your widget patent. T…
People are worried about Situation C: React is licensed under BSD + PATENTS. You sue Facebook (or any corporate affiliate of theirs) for infringing on your widget patent. Facebook revokes your react license and counter sues you for copyright infringement. The patents clause doesn't have anything to do with any patents on parts of React. It's a way for Facebook to make it so that anyone who wants to sue them for paten…
You get counter sued whether or not there is a PATENTS file.