sure there is. the server sets it's own parameters, like in diablo, and whatnot. like multiplier is set @ 1x instead of 10x, and gravity set at 1 instead of 0.2, or balance set @ 0 instead of 10, or whatever. it can be controlled, but it has to be controlled by the server. Just lazy programmers, I think.
It's not a gameshark code, either... it's an in-game password entered cheat code. It's really easy to disable those.