To get a copy of a movie off Gnutella, for example, a user need only double-click and wait for the download, while videotapes require setting up multiple VCRs.

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Not only will Facebook need to boost its click-through rate and get users directly to advertisers, it will have to add value while doing so.

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That means users don't need to reveal financial information themselves, only click on a link that directs them to a malware-infected Web page.

FORBES: Magazine Article