I think part of what would make these things so especially useful is that they'd be simple FLOSS packages. "VC-backed modern-WvDial-replacement-as-a-service" doesn't sound so useful, does it?
A little considered aspect of current "moderation" is that the mere need to create an account limits the total content volume And percentage of posted content which one would need to moderate.
It's almost like a variant of security through obscurity which actually has a meaningful impact.
Because nowadays anything can be a startup idea.