Business Idea: Free Advertising.

Most well-known Internet-based companies earn money from advertisement - both companies and individuals. For convinience, let's focus on Google. Google sells keywords, aka AdWords, to companies which want to advertise themselves or their products with such keywords. For simple keywords, most of which is just a 'term' or a well-known 'two or three words phrase', Google may display lots of links associated with those keywords. However, when we typed a longer phrase or a complete sentence, the page seldom has a advertisement link at all. This is the beginning of this post. What happen if we can get one or two keywords from the sentence typed and then diplay advertisement links associated with the extracted keywords. (This is only when there is no link associated with the sentence.) For long-term partnership, how about offerring such reasoned links for free or at least with cheaper cost? ... For example, if you typed 'kernel', Google will display 'QNX ...' advertisement. However, if you typed 'kernel os', then Google has no ad for that. In this case, if Google offer the same ad 'QNX...' for 'kernel os' with cheaper cost or for free... And, another way is to use 'context search' for such a no-ad case. For example, the resulting page for 'kernel os' provides the context for some ads -- possibly they are related with 'kernel' and/or 'os' or other keywords the most appearances in the resulting page. If the typed search query is long such as a sentence, the query can be also a context for ad.