We're going to end up with influencers having one persona for their large normie audience on FB/YT and a much more conspiratorial and aggressive persona for the true believers on Parler.

Do the big platforms end up punishing them for content *not* on their platforms?

In both cases, they will be pushing their followers to their own sites for monetization, either via ads or merchandise.

In my House testimony last year, I recommended that the large social media sites limit (either block or downrank) links to domains that are known to host really horrible content, instead of doing case-by-case moderation. The competition issues, however... https://www.congress.gov/116/meeting/house/109697/witnesses/HHRG-116-HM05-Wstate-StamosA-20190625.pdf

I was thinking about the handful of sites that are known to allow direct calls for violence and the like, which realistically can't be considered a competitor. When one of these competitors is #1 in the App Store, however...