If you ever need to stop accepting new signups for a list, whether temporarily or permanently, you can do so by deactivating the list.
First, navigate to the list in Campaignzee.
Next, click Settings, then click Deactivate List in the dropdown.
Read the warning that is displayed. If you are sure you want to deactivate the list, click Deactivate List.
Your list is now deactivated. The hosted subscription form page will no longer show, and any submissions with the embedded form will not work.
Note: Deactivating a list will not unsubscribe members from MailChimp or cancel their subscriptions in Stripe. If you would like to do that you should do so manually.