After so many lean years and post-bubble disgrace, it is hard to believe the gusher of ad dollars and profitability flowing to some segments online. A year ago I wrote about the industry's need to wake up to the reality that the Web bounce back was for real. Now even I am a bit amazed at the sustained double-digit ad sales growth we are seeing. In fact, some sites are butting up against the limits of their own success with a problem most publishers would love to suffer—sold-out inventory.
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