I set a limit on my post.no matter what the essay/post content: humor, creative, political, finance, parenting. If it’s more than 2 pages I break up the topic and do installments. Max length on any post is 2 pages in a wordprocessing document. If it’s a tad longer then I know it needs editing.
Ironically, I/we get more and longer responses to our longer pieces. The the shorter ones we just get grunts. I don’t like grunting!