Ellise Shafer administratorIn a full-page ad in Sunday’s Detroit Free Press, the leaders of Black-owned media companies — including Byron Allen and Ice Cube — accused General Motors CEO Mary Barra of racism for refusing to meet with them to discuss advertising opportunities.According to the Detroit Free Press, the ad, which was signed by the heads of seven Black-owned media companies, alleges that Barra refused to meet with them “consistently, over time and after multiple requests.” They also