They're not referring to the Substack platform, they're referring to this specific newsletter/blog this post is in; it's made by the self-described "nonprofit i

They're not referring to the Substack platform, they're referring to this specific newsletter/blog this post is in; it's made by the self-described "nonprofit investigative team Chiron Return." Googling "Chiron return" I discover it's an astrological term and other posts on their home page makes it clear that they do write about astrology.