Lol, I love that quote ("your new society will end up consisting of approximately three principled civil libertarians and seven zillion witches"). It's very true, and not the least bit surprising. The only reason for free-speech focused social media to be a thing is because it is a pushback against bans and restrictions from Facebook and Twitter. But look who these platforms ban: for all the (in my opinion, laughable) talk of how these platforms are "biased against conservatives", last time I checked Twitter wasn't banning anyone for saying the minimum wage reduces overall employment, or that we should return to the gold standard, or that marriage should be reserved for unions of 1 man and 1 woman. They ban people for inciting violence, for repeating provable falsehoods over and over which can lead to violence, for targeted harassment. So your "free speech social media" is primarily for people who want incite violence, or lie over and over to convince people of provable falsehoods, or to harass others.