Someone at board level in there has made some nefarious decision around pricing to screw some particular business segment, while in parallel polishing some "truth-speak" around making the world wonderful with this pricing model.
I trust them less than most politicians, including some of those obviously nutjob politicians.
No one who had spent a single minute on Android's Facebook app or Messenger would put a single thought into using Facebook technologies for their front end. The fact that it's a popular choice is truly a mystery to me.
Facebook has ~3 billion users, you think not a single one of them uses React for web development because of FB's android apps? That sounds absurd, even for hyperbole. I'm not sure what point you're trying to make.