That’s fine — but it makes you a publisher, not a platform.
Forums are typically about back and forth communication among community members that does not match the business practice of publishing an anthology or how anthologies typical work.
If I'd have to be non-profit (which doesn't mean no ads, by the way), then this kills a lot of business models.
A darkly amusing solution to Eternal September.
The cell phone network is a platform and it has no moderation.
If you want to decide what is acceptable content, you're not a platform, you're a publisher. A stated rationale for protecting internet platform providers was to provide true diversity of political discourse. It wasn't to make it easy to run a forum for Ninja 400 motorcycle fans.
You want to moderate content, fine, you're a publisher and you should be liable for the content you publish. The same way you would be if you published that content as a newspaper or magazine instead of over the internet.
To be clear, it's not fair to classify them as publishers. Newspapers and magazines are not mediums of discussions like forums are, they're compilers of articles that people spend days to write and submit for approval.
To use an offline metaphor, forums are like clubs where people meetup in a room and have informal discussions about the topic of the club. Such clubs often have someone acting as a moderator, since if discussions derail from the club topic then the host of the club will become disinterested, as well as potential newcomers who have an interest in the club topic.
In my opinion, if a club must be classified as either a "platform" or a "publisher", I think the word "platform" fits better. However, you consider platforms as being limited to communication mediums like postal mail and phone networks. If that's the case, then I think clubs classify as neither.
I think they should have to decide on which they one want to be, and I think platforms should have greater protection against liability than publishers.
If you want unmoderated communities, they exist. Go use them. Stop trying to destroy the concept of moderated communities. (Removing the liability shield would be tantamount to destroying such communities.)
Some people want the audience of moderated communities, but they don't want the standards of those communities. There's a reason unmoderated communities have fewer (and different) users.
No they don't, because section 230 does not require them to. It does not even contain the word "platform".
You keep saying that as though it's a fact or a law when it's only an opinion. You should stop doing that.
In pre-section 230 law, even blocking content for vulgarity was enough to get you treated as a publisher, that decision was Stratton Oakmont, Inc. v. Prodigy Services Co.
Eugene Volokh has a good summary of this at https://reason.com/2020/05/28/47-u-s-c-%C2%A7-230-and-the-pu.... You might want to read it so you don't make completely uninformed statements on the internet. You should stop doing that.
The key point here is "in pre-section 230 law". Prodigy Services was one the cases that prompted Congress to pass Section 230. Why cite outdated cases to try to prove your point? What's next, Dred Scott v. Sandford?
And what about when the want to block content because they believe in an objective reality?
Citation needed.
The most prominent case that led to the passage of section 230 was the decision in Stratton Oakmont, Inc. v. Prodigy Services Co. which had nothing to do with politics.
Example: I want to set up a forum where people can discuss a specific topic. Such as the Arch Linux forum, or ones for vehicles (https://www.ninja400riders.com/, https://www.civicx.com/forum/). I am clearly not a publisher; I do produce content and do not want to produce content. So I am a platform.
Am I no longer allowed to decide what is acceptable on my platform? Even if I am running a forum about the Ninja 400 motorcycle, I now have to allow people to post about their Toyota Corolla or about how vaccines cause autism or the earth is flat? What about if I want to moderate the forum to keep discussion on topic and I need to delete trolling or spam, or lock/delete threads that devolve into political fighting among forum members?
You can't have platforms without moderation.