EVE Online's universe consists of 350,000 active subscribers piloting customizable space craft around 7,500 solar systems. Putting that many people in space with lasers might sound like an open horizon to awesome, but the players who hang out there created a fully functional free market economy that ends up feeling more like space accountancy. The ad may look like this ...
... but it doesn't tell you that you have to pay for those lasers. To do that, a lot of game play involves your screen looking more like this ...
As with the real-world economy, making a profit in the world of EVE Online is easier if you form corporations. While many spend years working together for mutual gain, others behave a lot like corporations do in the real world. Or at least how they would if they operated in a universe where murder is legal.