I have a story on Kindle that just went freebie a week ago. It's a science fiction short story.
I offered it free months ago on Smashwords, first, which unlike Amazon, offers that option. Through Smashwords' distribution, the story was also offered free on Barnes & Noble's site, the Apple store, and elsewhere. (I could have sped up part of this process by submitting the story to B&N on my own.)
When I made the story available on Amazon, I picked the lowest price possible, which was 99 cents, wondering how long it would take Amazon to find the free versions of the story and price match it. Several months later, with no price matching in sight, I decided to speed up the process.
On the story's Amazon sales page, under Product Details, there's a link, “tell us about a lower price.” I clicked on that link and reported the $0.00 Smashwords, B&N, and Apple store prices. Seems it took about a week or more for Amazon to price match, thus making the story free.
Now, a week later, the story has been downloaded 988 times. My original idea was to see how well this freebie worked as a marketing tool, if at all, to spur sales for my other stories. So far it hasn't worked one bit. It did, however, generate one review, after 633 downloads.
My conclusion, of course, is that despite the nice review, my stories must suck, and I must be a terrible writer. So of course I keep writing.
Here's the freebie:
http://www.amazon.com/dp/B005XD5GD0/?tag=absowrit-20