Doubting the power of a Sweepstakes to drive traffic? Look no further than the results from last night’s Esurance post-Super Bowl advertisement. Esurance used the first ad after the Super Bowl to promote their #esurancesave30 hashtag. And while many other Super Bowl ads touted a hashtag, none of them also put a Sweepstakes behind it. Did the Sweepstakes angle work? The answer to that is a resounding yes. Why? Because