As of March 1st, 2017, your Followers list has been moved and now exists on the oh-so-awesome Customers page. To be clear, Followers are users who are following your site on your mailing list, but have not yet purchased content.
Your followers can now be managed under the "Have not purchased" customers filter. Although they appear in the Customers page now, that does NOT give them free access to your content. As always, reach out with any questions!