Why is a URL showing eligibility below 80% when it is fully tagged?

If an entity is showing below 80% eligibility although it has been fully tagged, there may be a technical issue with how the tag was placed (e.g., it may have an invalid c2 value.) It is also possible that comScore is not receiving the server call if users consistently move off the page before the tag fires. To resolve the issue, please confirm that the tag was copied in its entirety from the Direct website and that the tag is placed as near to the top of the page as possible.