Ad impressions drop after NY Times moves to make sure ads it sold are actually being seen by someone. http://adage.com/article/media/times-sees-fewer-ad-impressions-viewability/298432/ …
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Ad impressions drop after NY Times moves to make sure ads it sold are actually being seen by someone. http://adage.com/article/media/times-sees-fewer-ad-impressions-viewability/298432/ …