I have a situation. Lets say I merge two contacts for the same person because they had different email addresses. For one of the email addresses though, the person had unsubscribed to all email communication.
How would the merger work in this case? Which email address' opt-out property would take precedence?
Yes, when I tried it last year, it worked exactly like @franksteiner79 put it. If you're merging A into B (i.e. B persists as the master contact record), then B's subscription limits prevail. Whenever you merge any two contacts, the master contact record's attributes would take precendence.
Do try it for yourself too, hoping things haven't changed since last year.