If you didn't understand before, now you know why Redfin has been objecting to the way Zillow presents listings, especially via mobile (see http://www.inman.com/2014/04/03/redfin-challenges-zillow-on-home-listings/). Of the 91.6 million unique visitors to real estate sites in the month of March, 53.1 million originated from the Zillow family of portals (zillow.com, AOL real estate, Yahoo real estate, etc.) Furthermore, 48.8 million unique visitors originated from mobile compared to 53.5 million from desktop. Is SEO now officially dead?