So I started my promotion experiment two day ago (see April 5 post) and so far 79 copies of my short story have been downloaded. The results? One great review, which I wasn't expecting because it is a very short story. Otherwise, no increase in sales. Now I do believe it is really too early to see an increase yet. People probably snap up free copies, but don't get around to reading them right away. I know I do. So I will wait and see and, of course, keep you posted.
Anyone who wants to can download the story free at Smashwords. Feel free to comment!