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If Facebook's approach is so great, by introducing a legal provision in the OSS license, how come it has not been adopted by any other company except for Palantir, despite being introduced in 2014?

I analysed 75+ OSS projects from 35 companies, and Facebook is practically alone.

https://medium.com/@raulk/list-of-companies-and-popular-proj...

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I commented elsewhere on this, but how about CDDL? IANAL but it seems to do the same thing, patent poison pill in the event of suit.

CDDL includes a "weak patent retaliation" clause [1], meaning you only lose the grant if you initiate a patent infringement claim within the context of the project, i.e. saying that the project you have adopted infringes a patent of yours.

And even if you do, the revocation takes effect in 60 days, which is pretty friendly IMHO.

[1] http://en.swpat.org/wiki/CDDL_and_patents

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