This is just me,
I hired an editor waaay back for a short story and the same editor for a novel I was writing. She did a good job on both.
In reading the edits she did, and analyzing them, I then was able to learn how to edit my own writing, and edit others writings for my Ezine.
So for me, paying the money was two-fold win fall. I learned how to edit, and I had my stories edited by a very good editor. Did I sell either? No, but what I got from the experience was worth it.
But, that’s just me. I’m willing to throw money at a learning experience and not care whether anything comes from it. Knowledge is my payment.