If a Subscriber is listed as Inactive for a form, it means that form has double opt-in enabled, and the Subscriber never confirmed their subscription.
In this case, it might be best if you reached out via email@example.com (or via the in-app messenger in your account) so one of our Product Specialists can take a closer look at your account specifically. If you could please include the name of the form and the email addresses of the affected subscribers, we'll be able to provide more exact answers as to what's going on (and how to fix it!).
Thank you! :)