Earlier quoted context omitted.
To me heddit.com looks like a parked domain that isn't serving any content, 3rd party or not, so isn't protected by Section 230 and doesn't need to be. Hypothetical examples aren't a great argument against real world situations that have already happened, but a fake example makes me suspect you aren't arguing in good faith.
This is a perfectly sound hypothetical. Do you only allow discussion with people who have experienced a direct hardship? Is that your line for moderation? I'm being antagonistic, but that's part of your 230 fix right? You want judges to draw the magical cutoff line. So what do you do about companies who run a shoestring budget? They can't play in this game?
But to address the argument as a hypothetical, I don't think it's a fully developed argument. Fledgling companies with small user bases have very little liability by virtue of their small community. A platform with a small community can't be used to do harmful things like incite riots and encourage hate crimes unless you are targeting a specific demographic. And if you're targeting a specific demographic that is prone to doing harmful things then you should be moderating it from day 1. If you aren't targeting a dangerous demographic you have to get pretty big before your platform gets dangerous by size alone, and I do think it's reasonable to expect companies to have some moderation figured out before their platform gets so big that it's dangerous. Plus, a small budget doesn't give founders/developers an excuse to not know what their platform is being used for. Hypothetically, if your platform was small and you didn't realize you were catering to Nazis, then you are liable if those Nazis use your platform to organize an armed march/protest that turns into a riot and people get killed. Or at least I think you should be, and that's why I think that Section 230 should be repealed and replaced with something in the middle- not a blanket protection for companies that don't even try to moderate their content, but some protection as long as they are actually trying.
Also remember that not moderating your platform doesn't mean that bad things will definitely happen and that you will get sued- Section 230 only applies to civil cases already, and there must be some sort of grievance for someone to sue you. The cops couldn't proactively shut someone down for lack of moderation. So even without Section 230, a company could roll the dice while they were on a shoestring budget if they decided that it was worth it to delay developing a moderation system in favor of a different feature. That's in their right, they just ought to accept the idea that they might get sued if something bad happened because they prioritized work on shiny features.
So I guess what I'm saying is yes, I don't think a shoestring budget is a defense for giving a company protections. A new car company can't avoid a lawsuit from ignoring a known safety defect just with the excuse that they didn't have the budget. A startup that can't afford to do something right either shouldn't be doing it or they should accrue some risk.