Well, for one... chess.com itself claims to have 140M users, which sounds major to me. Are you calling them dishonest? You should watch your mouth! You're a bad man to say that about chess.com. Secondly... the fact the entire public doesn't actually physically go to a public place does not make it no longer public. The point is that they have access to it, and random ones show up at random times. So... no.
Do you give all 140M people in India access to your mothers bathroom while she's showering? I don't think so! That is reserved for you and your father only.
You heard it here, folks - there is nothing that even resembles public about a space that over 140 million users across 241 countries can come to, and interact with one another, at any time. This is a private place, folks. Infact... feel free to post all your girlfriends nudes here (but don't violate the forum rules)
Of course if the issue were so simple and clearcut we wouldn't have had a recent string of supreme court cases / government officials arguing that major social media sites are infact public forums. But these are minor details.
Lol. Chess.com does not have 140 million active users, and the forums don't even have 1% of that. I guess there are other things about the internet that escape you.
Chess.com is also not a major social media site. Man, you're batting .000...