many people use linux, not just servers and companies, as time goes on it becomes more popular. there is a way to make bhd and jo work on linux (not sure of dfx) through the use of an emulator (Cedega):
http://www.transgaming.com/download.php
http://transgaming.org/gamesdb/games...l?game_id=3095
http://transgaming.org/gamesdb/games...l?game_id=3575
http://transgaming.org/gamesdb/games...l?game_id=3663