Etymology: from 12 April 2009 removal of sales rank figures from books on Amazon.com containing sexual, erotic, romantic, gay, lesbian, bisexual, transgendered or queer content, rendering them impossible to find through basic search functions at the top of Amazon.com’s website. Titles stripped of their sales rankings include “Bastard Out of Carolina,” “Lady Chatterly’s Lover,” several romance novels, GLBTQ fiction novels, YA books, and narratives about gay people.
Smart Bitches, Trashy Books did this with Bill Napoli as well, it's very... effective.