You can test on https://emailselfdefense.fsf.org/en/ where the license for the piwik script is not being recognized (which I know you are working on that separate task), but the script is being accepted instead of blocked so I wanted to mention it.
Should be fixed by pull request #23.
If the license for the Piwik script is not being recognized on the "Email Self-Defense" website, it could be due to various reasons. It's possible that the website's content management system or security configuration is not correctly identifying the license or properly blocking the script.
PrepaidGiftBalance