Just to be clear, and so that I get this off my chest: I hate it when my underground artists get popular all of a sudden. Not because I'm jelous of their success or any nonsense of that sort. Because afterwards, their music gets shitty. They lose their way, and their core values. Their music becomes more about getting the dollar, than writing something lyrical. For one of my recent favorite hip-hop artists, Macklemoore, the jury is still out.
Not only that, but the entirety of his music is based on the ANTI-Pop scene. He's never rapped about his bling, or his money, he doesn't give a shit about materialism.