[citation][nom]Pherule[/nom]If browsers had market share based on how good they actually were, Opera would be ahead of Chrome right now. Since Chrome has support and advertisement from a huge company like Google, and Opera has virtually no advertisement, naturally Chrome is gaining market share.Opera could take off - if they get their advertisement right. They need to make some deals with a few larger companies.[/citation]
Opera can't afford advertising and doesn't need it either.
For starters, they enjoy a very healthy position in the mobile market, where they managed to gain a name for themselves (primarily by being the first functional mobile browsers, although they were also the first functional web browser, yet didn't manage to capitalize on that). On the desktop, their market share is clearly high enough to turn a profit (Opera Software ASA is a profitable compnay).
Second, a large portion of their revenue comes from licensing. For example, the Presto rendering engine (one of the fastest and most consistent in the browsing world) is used by Adobe's CS4-5 for rendering. Given the size of Adobe, the licensing fee might well be their primary source of income.