Advertising's 'most hated man' is back with a new warning for CMOs

Former ad agency exec Jon Mandel set off a firestorm a decade ago with a presentation about alleged agency kickbacks.ANAA version of this post appears in the CMO Insider newsletter.Sign up for Business Insider's weekly marketing newsletter."At best a 'C,' probably a 'D.'"That's how Jon Mandel says he would grade the current state of transparency on Madison Avenue.It's been a decade since Mandel, formerly CEO of the WPP media agency Mediacom, publicly alleged kickbacks were widespread in the ad i