Did you read Charlie Stross' entire comment? He's not hopeful about the economics, and he explains that in the very next paragraph from the one you cut and pasted:

Asking $5.00 for a 12,000 word novelette with DRM on top is not going to boost sales relative to, say, $8 for a 120,000 word novel, also with DRM. So I expect sales to be no better than their current ebook sales, which is to say, dismal. Let’s be optimistic and say they can shift a thousand copies of each story — 1000 sales via Kindle is enough to put you in the monthly Top Ten Bestsellers on that platform. That’s revenue of $5000 for a story, of which somewhere in the range $1000-1500 goes to the author. More realistically they’re going to sell 100-250 copies, meaning the author might get $100-250, eventually, after a couple of royalty periods (6-12 months). Compared to the $600 they’d get from Asimov’s SF, for example — with their rights back after 12 months.

For a tenth of the words that go into a novel that would earn them $10,000.

Does Not Compute, does it?