Yeah I saw that too and shook my head. The idea that organic SEO is somehow cheaper or more cost effective than PPC is missing the point. Ranking in organic is definitely not free, everything has a cost.
There are a million reasons why someone would want to pay for traffic and conversions is one of them. Creating mindshare is another. Building links is another, etc. etc. etc.
I didn't want to respond to that post because it's off topic but there you go. Lucid, ya' learned a lesson for today. Please keep on topic with your next post.