Is it just me or does he has more than 3 AdSense banners and more than 2 AdSense text ad units on one page? http://www.askthebuilder.com/805_Custom_Stairs.shtml How come he can do it?
google ad allow you 3 ads unit n 3 link unit. for special publisher it allows you more than this. how to become special publisher? its only by google ok you not have permission for more than three
He is a premium adsense subscriber. Google has special team for them. They can do anything that they have got as inputs from google adsense team.
he is premium publisher, if u have 5million page impression in a month then google will invite you become a premium publisher
Google adsense ad allow to 3 ads link unit and 3 ads text link units, if more than 3 the ads will not show on your site/blog