1. A method of processing signals at a receiver station based on a broadcast or cablecast transmission comprising performing at said receiver station the steps of: storing a subscriber datum at a computer at said receiver station, said subscriber datum being one or more of the group: a property datum; a financial datum; an income datum; an interest datum; receiving mass medium programming and one or more control signals in said broadcast or cablecast transmission, said mass medium programming including digital data; detecting the presence of said digital data and said one or more control signals; passing said detected digital data and one or more control signals to said computer; generating a benefit datum by processing said stored subscriber datum in response to said detected and passed one or more control signals; selecting one datum of said detected and passed digital data included in said mass medium programming based on said benefit datum; and outputting to an output device at said receiver station said selected one datum of said detected and passed digital data during the course of a presentation of some of said mass medium programming to said output device at said receiver station, wherein said step of selecting provides in said presentation information otherwise absent from said presentation of said mass medium programming at said output device at said receiver station.