like google and amazon get big slices of out by but so do less known kompany these are the data brokers. trading data is a lucrative market so-called data brokers gather personal data and enrich it with further information before trading huge databases. called hoyer works for privacy international which is trying to make the data broker network more transparent. the reason most of us don't know data brokers is because we're not their customers with their product. data brokers gather data from numerous sources from public records at registration offices or sweepstakes or customer loyalty cards add to that the data on web surfing behavior provided by trackers or online profiles this tells them a user's name their address their char but it also reveals what they like for