Just want people's opinions on what they consider to be the best way to make money. Option A: Making an anthology of flash fiction stories you have written and selling it on kindle. Or option B: selling your flash fiction stories individually to a magazine.
No direct experience of this, but some things do occur to me. I have never posted in this subforum before, so I expect to be corrected on loads of this, and would appreciate that:
Option B: Magazines pay by the word for fiction, I think, for non-exclusive rights. Maybe they pay a flat fee. But I don't buy any magazines containing flash fiction. In fact I barely ever read flash fiction, and when I do it's usually via some social media link or other. So I'm going to assume any magazines containing flash fiction are niche products, not in the commercial mainstream, and thus don't have loads of money to play around with. Their rates are going to be awful, and you're going to sell one a month. This doesn't feel like 'a way to make money' as much as 'a way to defray the cost of one dinner a month'.
Option A: Does anyone sell a lot of flash fiction collections on Kindle? Dunno. But at least here you could bundle up a lot of content into an extent that someone would consider paying 99p to read. Again, this feels like pin money unless you can point to someone making a living out of it.
The only times I can recall spending significant time reading flash fiction:
1) Michael Swanwick's Periodic Table of Science Fiction (published in the late lamented SciFiction, I think?)
2) This guy Joel Golby whom I follow on Twitter and who posts links to amusing flash fiction he writes - I think it's a Tumblr.
The only times I can recall spending significant time reading short stories in recent history:
1) Ebook collections and anthologies
2) The two magazines, The New Yorker and Harper's, I subscribe(d) to (placing stories there is left as an exercise for the reader)
3) Online - Tor.com, SciFiction (as was), Strange Horizons etc.
Just going by my own experience as a reader, it's a rare writer who can make money out of short stories alone, and flash fiction feels like something nobody makes money out of. There's a guy on our list who has won every award going for his novels, and who has a stack of flash fiction nobody can work out how to publish in a worthwhile way.