Pay $29 for a ticket to the top of 30 Rockefeller Center in Manhattan, and you can expect to see a few things: excellent views of downtown and Central Park, a few tidbits of NBC broadcasting history, some kid trying to surreptitiously drop pennies off the roof. But one thing you might not expect to see is a contextual ad for Google's latest search campaign unobtrusively hanging out on one of the coin-op binoculars.

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