How do you Monetize a Browser?

You might, from time to time, wonder how any number of application providers that "give away" their products actually make money.

Browser providers traditionally have made money from advertising, so it is no surprise that Opera Software has purchased two ad-serving networks.

Opera has bought Mobile Theory and 4th Screen Advertising, and in 2010, Opera purchasedAdMarvel, another advertising company.

By swallowing Mobile Theory and 4th Screen Advertising, Opera said it hopes to "better monetize" the traffic flowing through the Opera Mini and Opera Mobile browsers. Opera buys mobile ads networks