Google is paid by click, so placing the sites most likely to attract clicks on top ensures that Google earns as much as it can. There is nothing wrong with revenue maximization, of course! It is simply important to call a thing what it is, and not another nothing.
IBM's famous commercial showed two-dozen employees lying on mats trying to come up with good business ideas. Thanks to keyword research opportunities, today's small business can harness the same kind of power -- but without an IBM-sized payroll.