Allow members - who previously did not qualify for an engagement program email - to qualify again in the future

Many of us use nested/child programs in our Engagement Programs since it gives us enhanced, more granular reporting/attribution capabilities and additional flexibility to block specific members from receiving certain emails.  Here's a look at one of our EP structures (where additional smart list logic is contained in the “send eDM” smart campaign - and it’s this campaign that’s placed into the EP stream):

For example, if we know someone has already downloaded/engaged with a piece of content that's being promoted in an EP email, we include the appropriate filter to prevent them from receiving the email as part of a cast (unfortunately though, they will not move on to the the next email until the next cast (1 week, 2 weeks, etc.) and will receive nothing - but that's another issue: ).

Let's say we include some additional smart list filtering that may prevent an email going out to an EP member due to their email preference settings.  When that happens, Marketo marks them with some sort of "hidden" program status to ensure they can never run through this program again.  For those of you that don't used nested/child programs in EPs, Marketo will exclude any member of that program from receiving the email (similar to how they exclude any member who's already received the exact email of a simple email-based EP).

But because of this "hidden" program membership - even though they're not really a member with one of the actual program statuses of the program - this person will NEVER qualify for this program/email.  And that's the basis for this idea:  If someone, for example, changes their email preferences - or takes any other action that now would now qualify them for an email within a nested program - let them re-qualify so that they can/will receive this email as part of a future cast.  Or alternatively, allow us to change this "hidden" program status to "not member of program".  This will ensure that anyone that's a member of an EP will receive the content for which they qualify - whether now or in the future.