What patents, exactly, is Facebook infringing? And considering Facebook has one rather specific product: How would it help these companies if Facebook avoided their patented technology, unless they're trying to start a social network? And if they're starting a social network: is there anything that makes it plausible that their lack of success in unseating Facebook is due to this technology?

And if they're feeling the pain, have any of them sued Facebook and won? If not: Is it because they're using React? If not: How does the patent grant make a difference then?