No it’s not a public space.
Public space would be a place like a national park or the sidewalk. These forums are owned and operated by a private company, they’re private spaces and can be moderated however the company sees fit. Same thing for Twitter or Facebook or Lemmy.
A senator has the right to tell them that they need to do a better job at moderating their platform if there’s reasons to believe they’re letting people threaten violence or incite criminal activity.
Blazingtransfem98@discuss.online 2 days ago
Privately owned company.
Another thing, the first amendment doesn’t protect against violent or criminal speech, like terrorist threats/advocacy, threats towards individuals (bodily harm, sexual assault, murder, etc.) things which there is no shortage of anyway on Steam and they have every right to force the platform to moderate this, on the count of it being against the law.