If they are hosting the game online its not cut and dry that they have a legal requirement to distribute the source code under GNU Public License. I would read up on this more to get a better understanding as there is a lot written about this. See this: http://stackoverflow.com/questions/539291/rebranding-a-gpld-... among many other threads. There is dispute about the term "distribute" as if its on online app they are technically not distributing the code to anyone but it remains on their servers.
aleprok|13 years ago
They are distributing the client binary to everyone who want's to play the game and GPL requires to distribute the source code.
Then again AGPL requires them to distribute the server source code, even though they do not distribute the binary to the players.