After you have set up and started your campaign, a minimal amount of maintenance needed for your Market Builder subscription. Other than assigning unused addresses to empty mailing slots (which is also optional) the system requires no interaction.
You can, however, view mailings to gauge how effective each one has been, view the addresses assigned to each mailing period, and view summaries of past and future mailings. If you purchase additional addresses, you can also add them to your farm.