A new happiness-themed marketing campaign by Coca-Cola has gone viral, getting more than 712,000 views within its first 24 hours. Launched by Definition 6, the ‘Open Happiness’ global advertising…<img src="http://feeds.feedburner.com/~r/marketingvox/rss/~4/Wjnyrk2g8F8" height="1" width="1"/>
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