Before there was Substack, and long before the word “creator” was used with any kind of seriousness, there was a small newsletter tool that captured a moment: TinyLetter. Appropriately humble in name, TinyLetter was light on features and heavy on focus. The canvas was a blank text box; the platform itself the most bare-bones way to send a bunch of emails. Publishing on TinyLetter meant stories would never be loud, go viral, or make any money. But this quietness was a strength, and for…