Facebook claims that if every company adopted a React-like license, that software patents as we know it would basically die. It's worth noting that both Google and Facebook's patent lawyers are generally of the opinion that software patents are net bad, but differ in their opinions of how to express that intent without exposing their companies to additional risk from patent trolls.
If you want to be acquired, then this is the opposite of what you want. You file patents for every part of the product you can; you audit your dependencies to avoid copyleft (AGPL and GPL) and React-like licenses, so your software can be folded into a 100% closed source product or shut down or whatever your acquirer wants.
If you run a start-up, and you're worried about the React license, you should be speaking to your own legal counsel about the best way forward.