Tie two filters together by time - Lead Creation and Add to List.
I use the web service API source type to create leads from OptinMonster, and those leads are then immediately added to a static list. Is there a way I can filter to see which leads originated from that api? "person was created by web service api within a minute of being added to this list", indicating that api is the acquisition source. I'd like to do a batch run to see who in my program meets this criteria.