Please consider the two scenarios below:
Using SQL, we're filtering Campaign Members based on some criteria to create a Sendable DE.
- Which is the correct relationship to use to SubscriberKey? The CampaignMemberId or the LeadOrContactId? If I don't use the LeadOrContactId, this would be considered as new contacts, right? Can anyone confirm/reject the above?
- When we use the CampaignMember Object directly in Journey Builder - Does Marketing Cloud know to use the LeadOrContactId field, or are these counted as new contacts?