What happen to all America Next Top Model Winner?

I live on the other side of the world not in the States but watch ANTM religiously. I know all the winner but did they really make it big? It seems not, Cause till now I don't see any of them in big fashion ads, campaign etc, etc. And I thought the title is ANTM. If they juz dissapear after the show, then the show shld be rename America Next Model. And not Top. The only model I saw from ANTM was Nic the runner up ! And that was only a detergent ad in Instyle mag ... Gosh ... Can show me website or etc that I can see the winner in any ads or campaign. Anyone?