I'm sympathetic to the idea of paying for content directly (I spend over $100/mo on Patreon), but I feel like Substack has cultivated a nasty branding issue for themselves. To me, and I know I'm not alone, Substack is where you go when you want to hear some 17-year-old who got high for the first time tell you what THE MANNNN doesn't want you to know, duuude. Greenwald and Taibbi and the like. I guess there's probably other types of content on there, but that's all I ever see from the domain.
Anyway I'm not going to register an account to see whatever's going on with Notes. Good luck, guys.