I can think on one other alternative, at least in countries with big public boradcasters, that have money. Here in #Germany, @ZDF has made public, that they are working on a #Twitter-alternative. So clearly they think, it's their mission, to provide a #SocialMedia-plattform.
So then, why reinvent the wheel? Just set up a #Mastodon or #Fediverse-instance for the public, that already funds the broadcaster. So we would pay, but not a new fee, but with existing costs.
jeffjarvis