@gruber I thought this interview perfectly makes your point regarding Substack. He’s introduced as “writing independently on Substack.” But at the conclusion five minutes later, Inskeep says, “Paul Krugman writes for Substack…”

https://www.npr.org/2025/07/14/nx-s1-5464923/noble-prize-winning-economist-paul-krugman-discusses-trumps-use-of-tariffs