When I decided to try to publish my erotic works for sale, and mentioned it to my good friend he sent me a link to a forum about selling sex books. There were hundreds of comments, and I spent the entire day going through it in depth, learning the "tricks of the trade." But the $3000 a month has never come for me. I consider it a good month when I break $200 a month. But I must admit I'm building. Semi-steadily.
Over and over I hear comments of people saying they want to publish only on Amazon because its "where the money is at" and yet B&N has always been equal for me, and lately its been fighting to take lead.
Another perk is my sales on B&N have always been steady, in June when I took my long break for family and personal reasons and didn't put anything new out, my sales dropped by a few bucks on B&N, still achieving at least 3/4 of my sales. On Amazon? It dropped more than half.
Writers want the knowledge that when they're struck by writer's block, the muse is courting a story that doesn't fit in your genre, or they have an emergency come up and writing is set aside for a bit that they will still bring in income. The shoddy hit or miss of my Amazon sales ensure that I'll for sure keep my writing off the KDP Select program due to the steady and strong numbers on B&N.