New traffic source: Yahoo Advertising
Category Search / PPC (Adwords, Bing, etc.)
CEO Marissa Mayer announced at the company’s CES event on Tuesday the introduction of Yahoo Advertising, a united platform for that will simplify the purchase of ads on Yahoo’s various properties including Tumblr.
More info here:
http://mashable.com/2014/01/07/marissa-mayer-yahoo-advertising/