On Amazon Failure, Meta-Trolls, and Bantown by tehdely about trolls, amazon, and the abusive ranking system. Already linked this one, so just added for context for the next.
bryant has a discussion here on a claim of deliberate trolling and a partial debunking, along with speculation. The only thing that really doesn't work for me in the explanation is the hit on the erotica category not related to GLBT.
And related, #amazonfail is a Symptom regarding amazon's architecture and user rating content.
Also, from tzikeh:
The Guardian: 'Gay writing' falls foul of Amazon sales ranking system, an excellent article on the situation as it stands.