I use self-hosted Listmonk. Works great in combination with my blog. But yeah its slow growth. But that's actually what I prefer, because if you grow fast on Substack, these are gone as fast IMO as people don't really read substack emails anymore after getting 10 of them every day (as subscribing is so easy on Substack). So having a slow, but honest subscribers and then sharing it on socials or reddit in places where it genuinely helps people, there will always be some who will subscribe and read.

I agree, if you don't publish anywhere and just write on your website, and you're not yet known, it's hard for people to discover initially. But in the beginning, the writint is also more for you, than for others. I haven't read from anyone that writes super good on day one. That will come with the reps, and by then, people will read you, have discovered you.

Push as in a newsletter alone isn't doing anything. It's the "show ocassional posts of you on an already captive audience of millions and especially readers with similar interests" (the whole Substack base) that does it.