Thanks @Gina
Interesting. That then lead me to question comparing @wordpress with #Ghost as why wouldn't a self hosted wordpress work in a similar way.
I mean I can't see why Ghost is particularly better still. Wordpress with Fediverse plugins is kinda similar, and more control. Just musing to myself here... unless you know.
I think the "feed" and the "algorithm" are why people go to the SubStack world... maybe? not sure.