A method is disclosed for sending targeted advertising data, the method including monitoring in a plurality of data communications networks, single sign on (SSO) subscriber event data from a first SSO subscriber end user device and a second SSO subscriber end user device, calculating product interest correlation scores in a plurality of advertising categories for an SSO subscriber advertising profile based on the monitoring SSO subscriber event data, selecting advertising data in at least one of the advertising categories from an advertiser database based on the SSO subscriber advertising profile, selecting a format to deliver the selected advertising data to a third SSO subscriber end user device and sending the targeted advertising data to the third SSO subscriber end user device. A system and a computer program are disclosed for performing the method. A data structure is disclosed for providing an interrelationship between a processor and data structure data.