Carriers could presumably share the revenues generated by Google's keyword-based ads.

FORBES: Magazine Article

Instead of focusing on real, meaning-based relevancy, they supplement their keyword-based algorithms by counting the number of links that lead to a page and factoring the page's popularity into its placement in search results.

FORBES: Magazine Article

Over the past 15 years, most folks have learned to appreciate competitive keyword advertising based on their first-hand positive experiences using it.

FORBES: Florida Proposes to Ban Competitive Keyword Advertising by Lawyers