There's a failsafe way to make money out of writers.
Run a short story or poetry competition, and attract as many entries as you can: the internet makes it easy to find writers' groups and message boards where you can advertise your competitions for free. You don't even have to charge an entry fee (although you can if you think they'll pay): just get those entries in, as quickly as you can.
You don't need to read the entries: it's quantity you want here, not quality. Just bundle all of them altogether into a single anthology, stick an ISBN onto the cover, and download it to a POD provider. And that's all your editing and production work done.
The marketing on this project is very easy too: all you have to do is tell all the entrants that they've won a place in the competition, and that their work will appear in your prizewinners’ anthology.
Add the anthology to Amazon, and you're away. Make sure you price it qute high, to maximise your return; then wait for the orders to come in. Chances are that most of the people who are included in the anthology will buy themselves at least one copy; probably more. And each copy that's bought brings in more cash for you, for very little effort.
As I said, it's a failsafe way to make money out of writers. It's just not a very nice one.