Few topics split opinion in media buying quite like principal media, the increasingly common practice of agencies reselling media inventory at an undisclosed margin. Critics see conflicts of interest ...

Principal media is never far from trade press headlines but yesterday, Kristiaan Kroon, the soon-to-be CEO of Omnicom Media Group, said that “there’s absolutely no reason why” principal inventory can ...

Demand for principal based media buying expertise is rising among the industry’s top clients despite long-held transparency concerns, according to WPP’s top execs. Speaking as the once market leading ...

Given the changes in the advertising world concerning media buying over the past decade, it is somewhat surprising to see that in a recent ...