MC Unsubscribe = MC deletion, which affects MC reporting

[artfulrobot]

This had me flummoxed!

When someone unsubscribes (or you do it through MC admin interface), MC sends a webhook. CiviCRM then begins removing the contact from the various groups. But hook_civicrm_post realises that someone is being removed from a MC group, and triggers a MCAPI delete operation on that email.

This means that the unsubscribe information is completely deleted from MC; you will not (presumably) then be able to tell how many people unsubscribed as the result of a particular campaign etc.

I would have expected that CiviCRM removed the contact from the MC groups, but did NOT tell MC to actually delete the account.

I think this is a bug because it degrades the MC reporting functionality, which is one of the main reasons for wanting to use Mailchimp instead of CiviCRM for mailings.

[deepak-srivastava]

This has been fixed with v1.3. Thanks to @artfulrobot 👍