My opinion is no, they shouldn’t be beholden to paying for links and having to share certain links. That’s not good policy.
The real issue is whether these apps should carry emergency alerts and information, which is a much better way to frame it because that’s the actual issue here.
My bet is if there were an emergency broadcast protocol Facebook would adopt it, it would increase the legitimacy of their platform and build up some political equity they sorely lack right now.