Scale does not matter. Where in the constitution does it say “scale”?You have freedom to censor your small online forum as you see fit, you are welcome to censor your mega-super Facebook platform as you see fit. There is no distinction here. Those people who get kicked off a platform are free to set up their own forums (or go to telegram or whatever)and yell into the cloud about the wrongs done to them and set up their propaganda bot; no law says you have to host them.
It should matter. In fact, this is why antitrust law exists. If ideas are a marketplace, then Facebook has pricing power in that market. Facebook is big enough that it's actions alone dictate the opinion of a large portion of America. Twitter used to be the same way.
The answer to all this censorship is simple: break up Facebook. If we absolutely, positively can't, then make them a common carrier, regulate them like a utility, and strip out all the profit incentive to keep bad actors on the system. The funny thing is that Facebook's crimes are not merely censoring what they believe to be disinformation, but also amplifying people who break their own rules. Facebook and Twitter had world leaders policies intended to justify keeping politicians who break their rules on platform, specifically so they could amplify them, because it made the company money.
In other words, everyone angry that Twitter banned Trump in 2021 should also be angry that Twitter didn't ban him in 2017.
