Create and maintain "the Great American Message Board" the same way the government funds PBS. Sounds like a great idea to me.
Sad fact is, you can't expect any platform to do anything, assuming that it's not illegal for them to do and cost of doing it is less than the cost of not doing it.
If you're a platform, and your people say we'll lose 100 million if we do thing X or we'll lost 20 million if we do thing Y, the correct choice is do thing Y. You're still losing, but you're losing less.
Welcome to capitalism in the internet outrage era. Burning Nikes and demanding that Chik-fil-a not open on your campus are the decisions megacorps PR departments have to deal with. They don't care about you, singular human, and your views. They care about the net effect on their bottom line.