It shows the incredible power that Zillow has and will continue to have in that market leadership position. You broke down how CoStar's new traffic is coming at a hefty cost, with $55 million spent in the first quarter alone on search-engine marketing to get eyeballs on their listing pages. How sustainable of a way is this of trying to close the gap with a site like Zillow, which has such a big head start? I'm thinking back to football. That's the question for the Russian oligarch or the Middle Eastern oil conglomerate.