What triggers the "Web" Source when custom variables are populated?
The client noticed participants successfully completing the screener with their source tracked as "Web" and their custom variables populated. They initially assumed these users clicked a generic "Join Now" button on the landing page, but realized this is impossible because the script blocks any user missing the CV variable. They are asking us to clarify the exact conditions and entry methods that result in a participant being labeled as a "Web" source while still successfully passing these unique variables.