He never really had a black card,no one in the hood embraced him really,outside of the teenage market.The hiphop/rap college radio stations(the staples that been around longer) didn't even really pump his shit.
His core audience are white's and others but if you notice even alot of hardcore underground white listeners dont support his shit or care for him as an artist.
Em knows who his fan base is and that those white kids sitting home on a saturday evening blasting his cd until it stops working.
Truth be told if he never put out another album,no one would really care outside of teeny boppers and the machine that runs him.
Even though I don't like Bill O'reilly, but he was right when he said no one 25 and older really listens to Eminem.