Adweek notes that while Twitter "stepped up its ad game yesterday" with the launch of the Tailored Audiences program, it still "lags...in building a real-time-bidding ad exchange."
Early partners of the Tailored Audiences program -- including AdRoll, Dstillery, DataXu and others -- say that "integrating data and buying ads are more cumbersome without an exchange," Adweek writes. You can find the post here.