Email Notification: I cannot add another recipient

We have always had multiple recipients, but I can no longer add one without upgrading.  The first free tier is perfect for our needs and there is no indications when looking at the other levels what tier we would need in order to have that functionality again.  It appears that we can keep the current addresses that were originally set up, but I cannot add one.  Please let me know why the change and what our options are.  We have just 3 to 4 forms that we use at any given time.  

The multiple recipients are now only available to Paid users. You will need to upgrade your account to be able to set up email notification to send to multiple recipients.  Free accounts are now limited to add only one recipient email. This feature was implemented due to the fact that some of the free users abused multiple recipient features. Your existing recipients are not affected. However, new email notification setup will only allow you to add one email recipient.