Updated: Facebook drops mobile ad partners HasOffers and Kontagent for holding on to user data too long

Updated 2/13/2014: Added Playhaven/Kontagent comment.

Corrected 2/13/2014: HasOffers provides mobile analytics to its customers, but does not do monetization or sell advertising on its own. Also, we’ve removed a hypothetical example of how device-level data could be used to do individual user targeting, which was inaccurate.