billion dollar business now a days

India
October 28, 2008 12:32pm CST
Hi every one now a days lot of online web companies are purely earning billion dollars from advertising only.Lets take google,yahoo,facebook etc...all these companies completely rely on advertising.The general concept here is advertising will not cease because it is required by all the companies and their products.Especially if it is a new company they must require some advertising.So these companies will earn forever.What is your opinion on this?
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