With the current release it is possible to add a subscriber to an audience in Mailchimp when active or remove when expired. This works well. However it would be a great enhancement if it would work the same as with joomla groups.
Add to an audience when active
Remove from audience when active
Add to audience when expired
Remove from audience when expired.
With this is is easier to send mails to only customers but keep them in an other list to get them back in the future after they are expired.
Since Mailchimp counts all the addresses in all audiences for invoicing I want to avoid double registration in Mailchimp.
With the above described new funtionality it will make this possible.