I meant to say that allowing comments is a selling point or promotional aspect because it keeps users engaged and give them a reason to come back. They have a reason to revisit the blog, see new posts, and comment on old posts. Having run a message board for over 20 years, I’ve observed that when people visit without posting something back, the quicker traffic dries up to almost nothing.
I’m more concerned that deleted content lingers on remote instances after it is deleted.