This is a really useful feature, but we do it slightly differently. (Thanks to Sydney Mulligan at Etumos for showing us this.) In our Engagement Cast programs, we have a membership status called "Excluded", which sits before "Sent". In the scenario described above, we would say anyone who is a Member of this Engagement Nurture, but does not qualify for this particular Send campaign in this Cast Program, we change their Program Status to "Excluded". This achieves the same result, the contacts are Members of the Program and are skipped in the cast priority. However, we are not making contacts appear in the "Sent" status, if they were not actually sent that email.
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