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引述 :『Google能透過網頁比對播放關鍵字廣告，Facebook卻根本就知道廣告會被誰看到。』

引述 :『NEWSWEEK: In 2004 candidates and advocacy groups spent about $673 million on broadcast commercials. That figure is expected to hit $1 billion this cycle. Why the surge? David Schwartz: The media landscape is much more crowded than it used to be. As a result you have to run an ad more in order to make an impression. A viewer needs to see an ad about 18 times before it sinks in. Plus, it used to be just national advertising, but the spending has gotten more and more targeted. In the last few elections we've seen a big percentage of the money being poured into swing states, and in the last election some of those ads were around-the-clock.』