Wrong or right should always matter!
If these fees where known at the start I would understand your argument, but they were introduced after we had already chosen to play.
Imagine I told you that you would get a $100 cash prize for running a marathon. Thinking this is a pretty good deal you start running, then when there are only a few minutes to the finish line I inform you that it will cost $120 to claim your $100 price. You are obviously upset, but I tell you that you have no reason to be upset because you can simply stop running.
This is what you are essentially saying.