putko writes "Chris Dahlen has written about BigChampagne, a company that looks at peer-to-peer downloading to provide marketing data to record companies. By analyzing what folks are downloading, when and where, BigChampagne can tell the record companies what people like, what other records they like and other information critical to deciding how to allocate marketing dollars. As mentioned in the article, record companies started using this information (secretly) even as they were trying to stop filesharing via the courts."
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