[showkiller]

I believe and based on the links below the data is sold by different entities to companies like Intelius etc.

https://www.scientificamerican.com/article/how-data-brokers-...

http://triblive.com/news/allegheny/8690215-74/drivers-inform...

http://spectrum.ieee.org/riskfactor/computing/it/us-states-s...