In the article, $250 was cited as “a good chunk of change for a short story.” $250 is not great but it is okay for a short story (40 pages or 10,000 words) from a relatively unknown writer looking for some promotional help.
I’m not well known but I have been published for almost five years. I expect to earn double that for a short story and ten times that for a novella. I know writers who make six figures from their lengthy backlist of short stories and novellas.
Note: I promote my short stories and novellas, I’m published with publishers with established short story and novella readerships, and I publish frequently (about one release a month).
The short story market can be very lucrative. However, you need to publish consistently.
Important: rather than writing for a publisher, self publish. As we've said, self publishing is free.