"According to Black radio programmers they avoided playing rap, because it was affecting their advertising".
And advertisers have always had a hand in hampering the exposure of African-American culture in the American media, from radio to movies and through to television. They've been afraid to alienate certain groups in America, in the early days, racist and biased Southerners for the most part. "No balls, mo' money" must've been their motto. They never learn, though, the f*ckers.