Deese says, "Thompson made ends meet for a few years by writing pieces for true crime magazines . . . ." Today, I doubt anyone is making ends meet by writing for any kind of magazine. I haven't tried it, but from what I hear the best one can do is pick up a little side money.
To prove his point, Deese says, "At the height of their popularity, in the 1930's, these magazines (with titles like True Detective, Master Detective, and Intimate Detective) paid very, very well, $250 for a 6000 word article, the exact rate they now offer in the 1990's."
Without doing the arithmetic, I think it's obvious that $250 was a good week's income in the 1930's, and was still worth something in the 1990s. Yet I doubt there are many magazines paying $250 for any kind of short story in 2018.
It seems as if this entry-level income is no longer available to writers getting their start. These days, the writer's apprenticeship, like so many others, is unpaid.