Opportunity brief · Oct 30, 2026

Simple Custom CSS Plugin

Add Custom CSS to your WordPress site without any hassles.

RevenueNo price in the listingNo price listed

OpportunityNot scoredAn opportunity needs a revenue figure of at least $1k a month.

1–2★ ratings5%complaints from Feb 2018–Jan 2026, 20% in the last 24 months — mostly history

Build difficultyLowNo third-party APIs, payments, regulation, hardware, or network effects; main work is WordPress compatibility and cache-safe CSS output.

The pitch, and what the numbers say

Simple Custom CSS Plugin — WordPress plugins · http://johnregan3.github.io/simple-custom-css

No revenue figure: see why on the full x-ray.

Why users leave

The free diagnosis shows the top complaint. The full brief has every cluster, the build ideas and the buyers.

Bugs/Reliability · 100% of complaints read

Media view is blocked when the plugin is active.

“This plugin has been around for years at yet still loads CSS in the most inefficient way, serving the CSS using a dynamic non-cacheable request on every page.”

What a challenger would build

3 build ideas, each answering a complaint above — in the full brief

Closest alternatives

WPCode—

Who is buying right now

No public buyer thread in the same market in the last 30 days. The scanner runs every 15 minutes.

Get the full Simple Custom CSS Plugin brief

Full 1-star breakdown with verbatim quotes, the build blueprint and every live thread — on every product.

How to read this

Sources: the product's public listing and reviews, its published price, and public forum threads. Revenue is an estimate unless marked verified by the founder; the formula and its inputs are on the full x-ray. Complaints are grouped by a language model and each quote is a verbatim excerpt, linked to the original review. Build difficulty is a model's reading of the listing and the complaints, not a measurement. Figures are a snapshot of Oct 30, 2026. Corrections: corrections.

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