We are in the process of deploying SFMC for our company and need to refer to minor data for our email sends (emailing parents of minors), but do not plan to actually email these minor contacts. To avoid being billed for these minor contacts, can they be loaded into a non-sendable DE? This way we can refer to the data in that table, but never use for sending? If not, what is the best way to manage this data structure?
As a side note, these minors are part of our CRM instance with a subscriber ID but we do not necessarily need to bring that ID into SFMC if that will help matters.