MMORPG's means Massively Multi-player Online Role-playing Games. I figured I should state this before I get to my point. Since MMORPG is such a commonly used term. That the actual definition is less widely used and known than its abbreviation.

After a period of roughly two years. The free market on any MMORPG will change drastically. From a market which allows players. Who put in enough effort to remain competitive. To a market which requires competitive farming in order to compete.

This is because after two years. There are already a number of high level and developed players in the game. These players will have the bulk of the wealth in the game. Allowing them to influence the market. By a significant amount.

New players who are coming into the game. Have to play catch-up with the established players. While the established players actually exploit both the poor and rich in order to become rich. Without a free market to sell there stuff. The value of items will remain relatively low. Without a demand for the items they are selling. This exploitation is not possible.