so SEO for them is a combination of guesswork and research (costs which Google don't have to pay, incidentally).
Are you for real; SEO is a wankers activity that directly harms consumers. The more 'Expensive' Google make it, the better, 'cos I wont shed any tears if the whole SEO crowd end up homeless.
As for the rest of your drivel; google maps comes top of the list because it is the most popular destination for Google users. Which part of that is too hard for you to understand?