@Jonathanglick Those longform writers mostly used to be on Twitter too, and I think the notes part is open without pay, for now. To the degree notes succeeds, like Twitter, or here, there will be a financial incentive to market ones work there. Probably the onboarding to subscribing will be even smoother than Substack makes it in general from notes, but I think that's a pretty marginal difference. 1/

@Jonathanglick For now, I think it's populated because subscription Substackers think quite highly of that platform, and are willing to help jumpstart notes with them. Its value might become a victim of success, if it really does become a new Twitter, as the clientele grows less select. But for now it is mostly Substack writers and subscribers (I found myself there via Substack's mailing digests to subscribers), which is imparts a helpful selection bias. /fin