Substack is doing it this time. They can allow outright Nazis and White Supremacist blogs, but Catacomb Resident takes the hit. This time it’s a bogus claim of spam/phishing. That may be just a ploy to hide the fact someone objects to the content. It’s been appealed, but I wouldn’t hold my breath. While the appeal is waiting, you cannot access to blog and subscribers can’t be notified.
So, if you really want to read Catacomb Resident’s output, there’s a mirror here. You won’t be able to subscribe, but at least it won’t be censored so easily, either.