Hi, FruitBat,
I think you have a unique situation due to your subject. It's not uncommon for those who write erotic novels or books with a subject of sex to use a pen name. And sex sells on the topic alone. (Many decades of marketing studies prove this.
You absolutely need to know the books related to yours or competitors to your own book. Do these books rely on author platform?
I honestly think everything's a guess here (give the topic) until you talk to an editor or agent (assuming you're going that route).
One strategy would be to pitch your book to an editor or agent in person. The reason that this would be so beneficial is that you could actually ask the industry pro for feedback on platform after you pitch.
If you get a YES (yay!), say, "Great, I'll send it. Now I have a question about platform. What are your thoughts about...."
If you get a NO, you thank them, then ask if he/she minds if you ask a quick question.
Okay, let's talk venues for pitching, because that's kind of my thing. At Pitch University (
www.pitch-university.com), I'm bringing in agents and editors, and it's all about learning and practicing with experts. We're a very new site, so you're VERY likely to get personal feedback.
In fact, Feb 27th, I'm bringing in Literary Agent Michael Larsen (of Larsen-Pomada Literary Agency), and he focuses on NF. Deep, deep, knowledge on the industry, as he's bee in it for decades.
You're welcome to pitch to him (follow our rules to create an audio or video pitch), but if you do, please email me (see contact page) privately. I honestly don't have a process yet for fielding pitches with adult content (or any content above a General Audience level).
But I'll figure out some way for you to participate, get feedback, and be able to ask all your questions. I may just need a disclaimer before your pitch link. Easy.
Hope this helped.