Credit card companies also have a lot of data on us - they know what stuff we are buying. Is this industry limited in how it may share this data for fun and pro

Credit card companies also have a lot of data on us - they know what stuff we are buying. Is this industry limited in how it may share this data for fun and profit? According to this source they do sell this data and it is used in targeted advertising: http://www.businessinsider.com/credit-cards-sell-purchase-data-to-advertisers-2013-4 http://www.businessinsider.com/credit-cards-sell-purchase-da... I wonder what has more weight - the purchase history or what one is searching on google? Now I would consider the purchase history of a user to be more conclusive than what he/she has been searching on google. Now go figure what the business minded people have been smoking. What is next? I would go for an analysis of the composition of garbage that goes out of a residential neighborhood; there is lots of data in it. Garbage analysis may be the next frontier! (and there is total coverage - even duckduckgo users are covered)