So the #Substack moderation decision doesn't make any sense. Two quotes from their statement:

"we don’t think that censorship (including through demonetizing publications) makes the problem go away"

"censoring or demonetizing the publications would not make the problem of hateful rhetoric go away"

Cool, so it's not censorship. You admit (twice) that you don't have the power to silence Nazis with your actions.

So this isn't an anti-censorship stance. This is a pro-Nazi stance.