https://www.platformer.news/why-platformer-is-leaving-substack/
This is a great story.
Substack can decide what they want to do.
Platformer decided they didn't want their content to provide money for people who helped literal Nazis, and because of a free and diverse market, they moved.
Notice that Nazis don't want to be on Nazi exclusive sites. They want a larger audience. But your right to speak freely doesn't give you the right to access an audience.