The computer gaming industry is of course massive and simulation games have been popular for a long time. Traditionally though, game makers made their money by selling games and upgrades for games. The SIMS being one of the best examples. I must admit to having enjoyed some of their games in the past, especially the classic Sim City.
Zynga has taken this to a whole new level of success with Farmville, a sim game which has become incredibly popular on Facebook. People pay real money to buy virtual tractors and other items in the game. This has now gone to such an extreme that Tesco is now about to start to sell real money vouchers in their stores.
In About Us on Zynga, they emphasize that their games are free, which is totally true, but there are elements in many of their games where you pay money to buy virtual things, or for example in the poker game, to buy back in to the weekly tournament if you lose your chips.
This adds an amazing dimension to this free game business. According to industry experts, as reported on Rev2.org, Zynga could be worth as much as US$5 Billion, which they predict could double in the next 5 years. Seems the concept of free and internet based games may have some commercial merit:)