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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To be sure, unlimited access meant there were busy signals, lost E-mail and sudden disconnects to deal with, but the price was right, and as a result the dial-up industry has been growing at an exponential 25%-per-month rate (click here to read about the best ISPs).

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Few players were willing to click through to the offer sites, he says, resulting in the low monetization rate.

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In a 2007 study, Alex Brill and Kevin Hassett of the American Enterprise Institute found that the revenue-maximizing corporate tax rate is about 25 percent (click chart to enlarge).

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We expect that marketers will focus less on CTR (click through rate), and instead find really creative ways to get through to consumers.

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One of its creators, Maria Mandel, the executive director of digital innovation at OgilvyOne, points to a Mobile Marketing statistic that mobile banner ads have a higher click-through rate than Internet banner ads--2% vs. 0.15%.

FORBES: CMO Network

First, it seemed to be excellent anecdotal confirmation that Twitter links really do have a terrible click-through rate.

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