Part 1 described the mechanics of an economy based on the unused processing power of desktop and laptop computers on the internet. Part 2 gave a detailed example of a digital media store like iTunes that could use this spare power to offer free music while still compensating the artists fairly. In this part, we'll do a comparison of some popular free Massively-Multiplayer Online (MMO) games between the revenue they earn and how and the revenue they could earn through the spare computer power of their users.

This is a possible use for the grid computing economy mentioned in part 1 , a media store funded by grid computing. The basic model works like this: a research group buys a large block of computer time for some major computational work they need done. That work is distributed in manageable blocks to users with spare processor cycles in exchange for credits.