What makes these companies the "new public square"? Some threshold for use? Is the "real" public square no longer the public square? If FB/Twitter/etc, are the public square, then the government should own them, right? Or does this mean private property can be a public square now and deserves protections because of it?

If I build the biggest coffee shop my small town has ever seen and it becomes ridiculously popular, is it the new public square and I'm no longer allowed to kick out people for being assholes?

This "big website is popular so now we must treat it as public space" is a take that I see kicked around but has lots of holes in it.

Frankly, it makes smells like bullshit.