I'm not sure if this has been discussed before, but I couldn't find anything about it with the search function, so here it is.
Today I received an e-mail from Amazon about one of my short stories (the shortest one I have ever written). The email was as follows:
During a quality assurance review of your KDP catalog we have found that the following book(s) are extremely short and may create a poor reading experience and do not meet our content quality expectations:
Name of Short
In the best interest of Kindle customers, we remove titles from sale that may create a poor customer experience. Content that is less than 2,500 words is often disappointing to our customers and does not provide an enjoyable reading experience.
We ask that you fix the above book(s), as well as all of your catalog's affected books, with additional content that is both unique and related to your book. Once you have ensured your book(s) would create a good customer experience, re-submit them for publishing within 5 business days. If your books have not been corrected by that time, they will be removed from sale in the Kindle Store. If the updates require more time, please unpublish your books.
The short in question is a charity piece that I don't get many sales on, so I just unpublished it. It's free on all of the other retailers anyway. I typically try not to write anything under 3k.
Anyway, just thought I'd let you guys know, for those who write shorts and didn't know.