We don’t allow content that promotes harmful or illegal activities, including material that advocates, threatens, or shows you causing harm to yourself, other people, or animals.
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Nudity, porn, erotica
We don’t allow porn or sexually exploitative content on Substack. We do allow depictions of nudity for artistic, journalistic, or related purposes, as well as erotic literature. However, we may hide this content from Substack’s discovery features, including search and on Substack.com.
Plenty of censorship in those paragraphs to any free speech absolutist who strives for ideological consistency. They're "cancelling" enormous amounts of what many consider free expression.
I think we can make a meaningful distinction between not carrying smut and engaging in viewpoint discrimination. When it comes to government censorship,, First Amendment doctrine easily distinguishes between content neutrality and viewpoint neutrality. Content neutrality is the broader concept but applies in less circumstances than viewpoint neutrality, which pretty much applies anywhere. So there's plenty of venues where the government can ban nudity and pornography and such, but can't ban opposing viewpoints from being expressed.
We don’t allow content that promotes harmful or illegal activities, including material that advocates, threatens, or shows you causing harm to yourself, other people, or animals.
...
Nudity, porn, erotica
We don’t allow porn or sexually exploitative content on Substack. We do allow depictions of nudity for artistic, journalistic, or related purposes, as well as erotic literature. However, we may hide this content from Substack’s discovery features, including search and on Substack.com.
Plenty of censorship in those paragraphs to any free speech absolutist who strives for ideological consistency. They're "cancelling" enormous amounts of what many consider free expression.