You keep making definitive statements. Are you saying that you can keep using React Native if your patent rights are waived? That'd only be the case of those patents don't exist - but even then Facebook is stockpiling patents related to everything connected with social networks.
Also, they'll likely be patenting whatever they can out of this technology, whether it's valid or not, you'd have to fight any action that Facebook holds against you - in the meantime invalidating everything, allowing Facebook to sue you for violating potentially dozens of patents; most everyone can't afford a lawsuit.
Facebook open sourcing all of these things is purely a power play, and not trying to contribute to the developer community. The power that this is going to allow Facebook to leverage in the future could get really nasty - it's why Google isn't using any of it.
Also, they'll likely be patenting whatever they can out of this technology, whether it's valid or not, you'd have to fight any action that Facebook holds against you - in the meantime invalidating everything, allowing Facebook to sue you for violating potentially dozens of patents; most everyone can't afford a lawsuit.
Facebook open sourcing all of these things is purely a power play, and not trying to contribute to the developer community. The power that this is going to allow Facebook to leverage in the future could get really nasty - it's why Google isn't using any of it.