Might be worth noting that the customer base patio11 is probably most familiar with are people who pay money for a program that lets them print bingo cards. They might be a different demographic than people who know what a gwern is.
For a data point, I live in RSS, don't voluntarily follow any newsletters, and have become conditioned to associate the ones I do get from some places I'm registered at as semi-spam. Also if I pay money for something, then it becomes a burdensome Rare and Valuable Possession I Must Now Find a Safe Place For, instead of a neat thing I can go look at, then forget all about, then go look up again after five years based on some vaguely remembered details. So I'll save myself stress if I stick with free stuff.
They might be a different demographic than people who know what a gwern is.
Maybe. On the other hand, would you entertain for even a second the thought of paying for an RSS feed? Personally, I can think of paying for an email newsletter if it's worth it, but the thought of paying for a blog with an RSS feed triggers an 'undefined' error in my head.
...Also if I pay money for something, then it becomes a burdensome Rare and Valuable Possession I Must Now Find a Safe Place For, instead of a neat thing I can go look at, then forget all about, then go look up
If it's worth saying, but not worth its own post, even in Discussion, it goes here.