But in some cases, one marketer's owned media become another marketer's paid media—for instance, when an e-commerce retailer sells ad space on its Web site.

但在某些情况下，某市场营销者的自有媒介会成为另一个营销者的付费媒介。比如，当某电子商务零售商出售其网站上的广告空间时。

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Advertisers once primarily bought ads on specific Web pages-a car AD on a car site.

广告商以前主要在特定网页上购买广告——轿车网站上的轿车广告。

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Its the same with a banner AD on a social networking site.

这和社交网站中的横幅广告是一样的。

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As the wire service notes, the two companies have been feuding over allegations that eBay used its Craigslist board seat to collect confidential information as eBay was building a rival classified ad site.

FORBES: eBay Hit By Criminal Probe Over Use Of Craigslist Info

The bills "supposedly address real needs, but in practice are means by which bad actors (with lots of money and lawyers) can take sites down, " Craig Newmark, founder of the online classified-ad site Craigslist, wrote in a blog post Monday.

WSJ: Web Piracy Bill Faces Fiercer Fight

That didn't stop a German public relations firm, unrelated to the cookie maker, from posting an ad on its site, offering the cookie thief a job after his marketing stunt.

WSJ: A Giant Gold Cookie Goes Missing, Sets Off Monster Investigation