The tool only detects a subset of paid Cloudflare users - specifically those with the default ECH settings. If your site shows as undetermined, it likely means you're on a free plan or a paid plan with ECH enabled.

From what I've observed:

- Free plans: ECH is forcefully enabled (sni=encrypted)

- Paid plans: ECH is disabled by default (sni=plaintext), but can be manually enabled

The tool can only definitively distinguish between free plans and paid plans that use the default ECH settings.