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- Social Media
---- Twitter Launches Tailored Audiences, Using Cookies, For Promoted Tweets
bill - 3:55 am on Dec 9, 2013 (gmt 0)Thread source:: http://www.webmasterworld.com/twitter/4628148.htm
App.net tried to do that. Eventually they opened up to free accounts as well, but they certainly never had the adoption that Twitter has. There is a certain appeal to an ad-free service that many will pay for.
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