You may submit Mementos that have already been dropped, but we don't recommend it, and we are unlikely to publish much older Mementos at this time. We recommend holding off dropping your Memento until just before your Insight is set for publication. If your Memento Insight is chosen for inclusion in our editorial calendar, we'll reach out to you to let you know it's planned publish date. At that point, you'll be able to decide how and when you'd like to drop it. We'll reach out to you within a week of this submission to give you a head's up.