The episode spotlights the controversial subject of online profiling, whereby Internet ad server companies, such as DoubleClick and Engage, track Web surfers in order to strategically target banner ads and site content, as well as to help sites keep a running count of visitors.

CNN: U.S. antidrug site dealing cookies

Imbruce has created an ambitious advertising program by offering banner ads and "immersive" campaigns to major clients including Dell, Citibank and General Motors, who target chunks of their advertising budgets at college students.

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