Moneysink

In Final Fantasy XI, gil (the currecy used throughout the Final Fantasy franchise) is constantly introduced into the game's economy through various activities. Conversely, a gilsink removes currency from the game's free market economy. Gilsinks are one of the few forces in the game that combats inflation.

The most prominent example of a gilsink would be a non-player character (NPC) such as a Chocobo operator. Human players pay the NPC for services. Since the operator is not a human player, it would never spend the money it receives, thus effectively removing money from the virtual economy.