For landing on an author's home page, that seems to be true, and I hope they allow disabling it later. For article links, you can -- when you publish an article

For landing on an author's home page, that seems to be true, and I hope they allow disabling it later. For article links, you can -- when you publish an article and Substack offers links for social media, there's a checkbox to disable "show welcome page to new readers".