Scores ranged 3.0–53.0 against an 85+ optimized baseline. Three blocked GPTBot; two were invisible to AI; none had a single citation-shaped paragraph. Full method published; re-measured every 60–90 days.
Method: differential fetches (browser UA vs GPTBot UA), robots/llms.txt/sitemap and JSON-LD inventory, and paragraph-length distribution against the 134–167-word citation sweet spot, weighted across five dimensions (citability 25%, structure 20%, multimodal 15%, authority 20%, technical access 20%). Every step is mechanical and reproducible. If your brand isn't in the cohort, we'll measure it free.