---- dataentry configoptions ----
type             : constant
name             : SHOW_LIST_OFALL_SUBSCRIBERS
purpose          : On the list and members page, show a static "list" that has all subscribers in the system as members
allowed          : true false 1 0
default          : false
status_s         : 
category         : segmentation
----

From version 3.0.9 onwards. This flag enabled will show a list called "All subscribers" on the Subscriber Lists page that has all subscribers in the system as members. This is because there is often confusion about list membership counts when there are more subscribers than members of lists.