And this advertisement not only supports the company which is marketing its product but also compensates for the platform on which it is doing so, in a big way. Consider newspapers, for instance, earlier only a few people were privileged enough to get hold of these knowledge pedias as they used to cost a lot, but as advertisement companies popped in, the newspaper agencies shifted revenue generation from subscription as a primary source of income, to advertising. This led to a drastic drop in price per unit, to a very minimal amount, making it affordable to the masses and within no time these grey sheets filled with nano words could be seen in the hands of the masses.