budbiss - 3:24 pm on Dec 27, 2006 (gmt 0)
I assume that because Google is the most popular search engine 'by far' (as I understand it), that Adwords must be the most popular PPC service 'by far'. Is this true? Is it something like 90% Adwords, then 5% YSM and 5% AdCenter? I'm asking this because I am trying to determine if it is even worth it using YSM and AdCenter.