In online multiplayer games, players may use macro scripts, which automate player actions, to automatically find items or defeat enemies for the player's advantage. The prevalence of massively multiplayer online games (MMORPGs) such as "World of Warcraft", "Anarchy Online", "EverQuest", "Guild Wars", and "RuneScape" has resulted in the trading of in-game currency for real-world currency. This can lead to virtual economies. The rise of virtual economies has led to cheating where a gamer uses macros to gain large amounts of in-game money which the player will then trade for real cash. The Terms of Service of most modern online games now specifically prohibit the transfer of accounts or sale of in-game items for 'real-world' money. Depending on the company running the game, this may or may not be taken seriously. Many online games subtly allow trading of in-game currency for real-life cash due to resources required for the company to find and catch gold buyers, as well as the revenue lost when banning someone buying gold.