They make search engines for all types of markets, they also sell servers with their search engines built in, they customize them according to the business needs. They use Cobalt Blue servers to make them. Most of the money from online comes from The adds. The way they have the adds places is the reason why so many people like them, it's not in your face. The way the revenue comes in is threw a click a pay agreement. You ever see google adds ?? They get payed the same way you do with thiers ...
I love google, I wish I would have thought of the stuff they do. Although they are using a search engine that was created by overture.