"7 Lessons Learned From Running An SEO Agency" http://moz.com/blog/7-lessons-learned-from-running-a-seo-agency-14225 The article says things like "I had a strict rule: if you couldn?t pay me at least $20,000 a month on a one-year retainer, I wouldn?t take you on as a client." and "It took me a few years to learn this, but once I did my minimum SEO engagement started at $240,000 a year and it went up to $1,200,000 a year." What kind of companies is this guy selling to that would pay $20,000 per month on SEO or Pay-Per-Click? Here I am selling to 5 dentists who pay on average about $700 per month each. I don't understand.