For the time being, this BuzzFeed list is very short.

But there’s little doubt it will quickly grow beyond the single media agency announced this week as having joined the website’s Social Storytelling Program:

Horizon Media and its clients will collaborate with BuzzFeed’s creative team on best practices for content creation and social advertising. The new partnership will allow the agency to use and respond in real time to the performance of branded content using BuzzFeed’s Social Dashboard and Social Brand Lift research methodology.

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