Re: "what's been revealed about Facebook's operations [..] has harmed investors"
What has 230 got to do with FB algorithms?
Section 230 removes liability for what users post and allows the platform to moderate without having to face expensive litigation. Actually, most 230 cases are really 1st amendment but 230 allows an easy test to throw a case out before it becomes expensive.
This is all about how FB presents the posts and what rules are applied (or not applied) during moderation - nothing 230 about it