2016 December Software Updates Highlights Zift123 users can now add marketing leads to custom activities. Dynamic Membership Rules have a new operator, "is not blank." Is not blank, makes it easier to create lists that have required data in the fields. December 21, 2016 (19833) Users can now add marketing leads to custom activities. Learn more. (19626) In Dynamic Membership Rules, users can now create lists that require fields to be populated for the contact to appear on the list. Learn More. Have more questions? Submit a request