This from @mmasnick is so spot on:

“your reputation when you refuse to moderate is not ‘the grand enabler of free speech.’ Because it’s the internet itself that is the grand enabler of free speech. When you’re a private centralized company and you don’t deal with hateful content on your site, you’re the Nazi bar.”

https://www.techdirt.com/2023/04/14/substack-ceo-chris-best-doesnt-realize-hes-just-become-the-nazi-bar/