After losing display ad lead to Facebook, Google is back on top

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After falling behind Facebook (s fb) in online display advertising revenue, Google (s goog) is back on top. According to a new report from research firm eMarketer, the search giant is expected to earn $2.31 billion in U.S. display ad revenue, up 38.5 percent from last year. Facebook, on the other hand, will bring in…

the rich get richer.