Polyamory Romance Market Intelligence Report 2026: Why-Choose, Reverse Harem, and the Label That Doesn't Match the Shelf

The genre's own social conversation barely mentions polyamory. 104 of 181 tracked posts (57%) cluster around "why choose" mechanics, while the explicit "polyamory" keyword surfaces in just 2 posts. Google Trends returns 0.0 relative search interest for the literal phrase.

This report maps a market where the label and the content have drifted apart. It is built from Amazon's bestseller snapshots (268 unique titles across six monthly pulls), 181 Reddit and YouTube posts, and LLM sentiment analysis of 105 titles carrying review text.

For authors deciding whether to write into polyamory romance. Known-author top-5 share sits at 20.36%, one of the most open debut lanes in the 14-niche project. Includes 6 data visualizations, a runnable Amazon ASIN targeting appendix, direct reader-review quotes, and an 11-point Known Limitations section.

Data collected January-June 2026. By EJ Nyman, Monster Romance Reviews.

Inside this report:

• The Short Version — Six findings up front: the why-choose mislabeling, the diffuse author field, the loss-leader Book 1 pattern, 47% month-over-month churn between May and June, and the negative tail that runs roughly one in seven posts.
• Content Gaps & Opportunities — Where the label promises more than the shelf delivers. The near-untouched polyamory-as-structure angle, the growing romantasy/dark-academia and audiobook-affiliate lanes, and platform-specific pitch guidance for Reddit versus YouTube. Each flagged as a lane worth testing small, not a proven bet.
• Market Snapshot & Author Profiles — 268 titles, a flat $4.99 median across all six months, a 62.3% series ratio, and the single clearest loss-leader pattern in the project: 12 of the 16 sub-$1 titles are Book 1s. Plus the three authors who held the list all six months (Tessa Hale, Sadie Hunt, Hannah Haze).
• Tropes, Heat, and Reader Sentiment — Fated mates and reverse harem tie at 45 mentions apiece, with why-choose framing close behind. A warmer-than-average heat distribution, and a red-lines read on the 14.4% of posts that run negative, with direct reader quotes pulled from bestseller reviews.
• Platform Intelligence & Market Position — Seasonal timing (June engagement runs roughly a quarter of January's), the Reddit-versus-YouTube conversation split, and co-listing overlap that puts Shifter Romance (41 shared titles) closer than Paranormal and Alpha Male combined.
• Appendix: Paid-Targeting Starter List — Runnable Amazon ASINs for five cross-niche hub titles and the six persistence-author anchor titles, ready to load into Sponsored Products author and ASIN targeting, with format and snapshot-date caveats attached.

One report, or all fifteen. This is one of 15 reports in the State of Romance H1 2026 Compendium: all fourteen genre reports plus the cross-niche flagship, for $49. Competitors charge $37-47 for a single genre report.