Marc Ecko's Urbanwear Line to Expand ( Wall Street Journal ) When Marc Ecko was 20, in 1993, he launched a men's urban apparel line out of his Rutgers University apartment, aiming to capitalize on his graffiti-artist roots and knowledge of skateboard and hip-hop culture. Marc Ecko Enterprises says its wholesale sales to retailers now exceed $500 million annually.   In the youth culture marketplace, style and credibility reign supreme. At the epicenter is designer Marc Ecko, the man behind the world-famous Rhino brand.