Zillow and Trulia make the majority of their revenue selling preferential placement of realtor profiles and selling consumer leads to these realtors. For Zillo

Zillow and Trulia make the majority of their revenue selling preferential placement of realtor profiles and selling consumer leads to these realtors. For Zillow 2014 Q1 it was $46.2M realtor revenue, $7.1M mortgage leads and $12.9M display advertising. Only about 20% of their revenue comes from ads.