First amendment is for public spaces, a forum owned by a private company isn’t a public space.
It’s a public space in Europe for sure. No idea why the US would think openly accessible forums are a private little backroom where rules don’t apply.
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.
Alright that’s still a weird ruling to someone outside America though because something like a shopping mall or a parking lot are public spaces here too as well as anything that is openly visible on the internet. Which makes a lot of sense.
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.