Advertising's 'most hated man' is back with a new warning for CMOs
Jon Mandel, who set off a firestorm in 2016 with a presentation about alleged agency kickbacks, has beef with principal media trading.
Jon Mandel, who set off a firestorm in 2016 with a presentation about alleged agency kickbacks, has beef with principal media trading.
This article was originally published at: https://www.businessinsider.com/jon-mandel-ad-agency-tran...