@clacke I thought they specifically said that it isn't DRM, doesn't restrict content, and would even temporarily disable itself sometimes to force websites to have to support not having it.
See: https://github.com/RupertBenWiser/Web-Environment-Integrity/issues/28#issuecomment-1646083436b and https://github.com/RupertBenWiser/Web-Environment-Integrity/issues/28#issuecomment-1651129388