Seeking Alpha Seeking Alpha Portfolio App for iPad  It seems
like the online real estate marketing companies such as Zillow
(Z), Trulia (TRLA) and Move, Inc. (MOVE) have figured out a way
to grow their earnings, by raising advertising and sales
department spend. In this article, we will take a quick look at
why this type of business is currently a continual "Catch-22,"
and the growing revenue that analysts are excited about is at
the cost of profit margin.  In these following quarterly
earnings reports, you can see a correlation between increasing
in ad / selling spend and higher increases in revenue. When the
spend is increased slightly, all three competitors usually show
moderate revenue increases and vice versa; with heavy spend
increases the revenue increases jump. This might explain why
Zillow has committed to a high spend increase in Q2 of 2013, to
generate high revenue and keep subscriptions growth high to
attract more investors. But the downfall to such a model is very
low to negative profit margins a