Touché! But the bit I quoted is something of a non sequitur as this case, like PruneYard, concerns a state law extending additional speech protections into the private sector, so PruneYard does seem relevant, as PruneYard affirmed a state’s ability to do this. Further, it doesn’t seem much rebuttal of this ruling about a state law to argue the First Amendment offers no protection to those censored by Facebook (as the part I quoted was doing). The First Amendment enters the case in terms of whether it protects Facebook from this law, not whether it protects users from censorship corporate censorship.