Let me simply this for you, when you signed up for it you agreed to the terms. You breach those terms, the key holder or whatever you wish to call it has the right to revoke it. That's how agreements and rules work.
So you did not get a key, to do whatever you wanted. You agreed, to the personal use only, by clicking the button. If you don't agree with the terms then don't click it. Simple as that, or you could just follow the rules in the first place .