We set up a trigger campaign that Marketing Suspends folks for 3 days post email delivery. They are marked Marketing Suspended, then a wait step of 3 days, then unmark. The only way I know of bypassing the Marketing Suspend is by having the email be operational. I know folks set up email preferences for the users where they can opt in to event invitations, but opt out of newsletters. We don't have that set up ourselves, but there might be some leeway there.