preslavrachev, Blog Update: I have successfully migrated email sending away from ButtonDown Email to a self-hosted Ghost instance. Nothing bad with ButtonDown - simply, Ghost has by far a better editing and publishing experience (and can be self-hosted, of course).
Speaking of newsletters, one reason to migrate was because I want to explore email communication a bit further. So, if newsletters are your thing, be my guest and add your email here: https://preslav.me/subscribe/#via-email I won't spam!