http://react-etc.net/entry/your-license-to-use-react-js-can-be-revoked-if-you-compete-with-facebook
Oh… I’m convinced that people at Automattic have evaluated this issue quite deeply, I dare say.
It seems that they don’t plan to compete with Facebook for quite a long time.
Or does it mean that they think that releasing Calypso under GPL make them safe from any litigation? Quite frankly I doubt it, but I’m not a lawyer so my opinion is not relevant.
People smarter than me already highlighted the issue and Automattic has already made a reasoned decision:
Paul Sieminski, General Legal Counsel for Automattic, responded to the ticket explaining why the company will continue to use React in its products.
As far as I can say it seems a policy similar to RedHat’s one: a defensive use of patents. May we call it a “patent cold-war”?