Suing a company for keeping to their own ToS which the user accepted? Only in America..
Actually, in every civilised country you can't "write just anything" in a contract.
Illegal is illegal is illegal, doesn't matter if it's written down in a piece of signed paper.
Or are you suggesting that you really believe that if you sign a contract which says you should murder someone, that contract is valid?
True, but i doubt "user pays fees to third parties" is illegal. To murder someone is illegal under most circumstances. To pay a fee is not. If paying fees is illegal, you may have a case against all Bitcoin exchanges and most banks as well.