CNN Money reports on companies that know your name, age, hometown, e-mail address, income and social networking practices and sell that information to advertisers. One such company, Rapleaf, has been getting a lot of attention after a recent investigation revealed that it sold Facebook IDs to advertisers, the report states. While privacy experts are questioning the company's practices, a Rapleaf spokesman has said the IDs were sent to ad companies "because of technical issues with browsers today in which the referrer URLs were including them inadvertently." One privacy expert said that when it comes to data mining, "You can mash up huge data sets that were never meant to be mashed together, that are very specific."
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