You can keep at least some behavioral-ad cookies at bay by opting out of the services at the Network Advertising Initiative's site.Online ads are not only booming--and scrolling, spinning, shaking, shouting, and singing--they are also watching you even as you are viewing them, capturing your click patterns to create more detailed profiles than traditional browser cookies do.
Behavioral marketing networks such as BlueLithium, Revenue Science, and Tacoda display ads based on your browsing habits. Spending on these behavioral ads will grow from $1.5 billion in 2007 to more than $2 billion next year, according to eMarketer, a market research firm. And the company expects video ads to account for more than a third of that total.
The networks say that behavioral ads are more effective for advertisers, and usually less intrusive for consumers, than are standard pop-ups or adware. But the potential for abuse is troubling, privacy advocates claim, and the vast majority of Netizens have no idea that their actions are being tracked so closely.
Visit any of the 1000-plus sites on BlueLithium's ad network, and your PC will get a cookie that records the Web pages you visit, the ads you click, and whether you bought anything. The network then delivers ads based on your interests: Shop for cell phones at one site, and you might see ads for handsets at another, unrelated site, while someone with other interests would see a different ad. Unless you keep a close watch on your browser cookies, though, you'd never know you were being targeted. BlueLithium chief marketing officer Dakota Sullivan declines to name any of the company's clients, but says that they include 70 of the 100 most popular sites.
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