You're mostly right, except: > revoke your React license when you sue them Incorrect; all they can do is revoke your patent grant and then sue you for patent

You're mostly right, except: > revoke your React license when you sue them Incorrect; all they can do is revoke your patent grant and then sue you for patent infringement. They can't "revoke your React license". So the difference is, if you use React they can only sue you for patent infringement if you sue them first; if you use something else they can sue you no matter what... ...if they have a patent on React. Despite your breezy assertion, patents are public, people have looked, and none have been found.