When it started last year, the Advertising ID Consortium promised to level the playing field in the digital advertising sector, amassing the support of dozens of independent ad-tech companies eager to reduce advertisers’ reliance on “the duopoly.” The rollout saw AppNexus, Index Exchange, LiveIntent, LiveRamp and MediaMath all pledge to create a standard framework to… https://www.adweek.com/programmatic/post-acquisition-att-pulls-appnexus-participation-from-the-advertising-id-consortium/