FourthWall Media announced the expansion of its MassiveData TV viewership footprint. New participants are expected to bring the total number of viewers who provide set-top box data to 4.7 million. Participants use 3 million cable TV devices in 1.8 million homes across the United States.The MassiveData cable TV panel was launched last August and collects census-level second-by-second usage data from traditional cable operators for all of their channels deployed in system. It combines the raw data with proprietary data-mining and analytics technologies to create actionable and targeted data.