> If you are a current free user
You can remain a free user so long as you have 2,000 or fewer contacts in your audience, and you’ll now have the new free plan features. If the new way of counting contacts causes your audience to exceed 2,000 contacts before June 15, 2019, we’ll automatically archive your unsubscribed and transactional contacts. After June 15, we’ll begin calculating your audience as described in Section 7B of our TOU, but you can always manually archive contacts to keep your audience under 2,000 contacts.
So it sounds like they are actually automatically archiving unsubscribed emails if it puts you over the limit.
OK, that wasn't in the original "Exciting updates coming to your Mailchimp account" email. That appears to be from today in the "Updates to your Mailchimp account" email from Mailteam Legal. I'm guessing someone from legal saw that original email and puckered a bit, and drafted this clarification.
> If you are a current free user You can remain a free user so long as you have 2,000 or fewer contacts in your audience, and you’ll now have the new free plan features. If the new way of counting contacts causes your audience to exceed 2,000 contacts before June 15, 2019, we’ll automatically archive your unsubscribed and transactional contacts. After June 15, we’ll begin calculating your audience as described in Section 7B of our TOU, but you can always manually archive contacts to keep your audience under 2,000 contacts.
So it sounds like they are actually automatically archiving unsubscribed emails if it puts you over the limit.