I agree, that would be super annoying, but at the same time the law would still be mostly working this case, since you still don't need to eg fax a form or have to get on a long phone call. I think "the effort you need to sign up" is a reasonable ceiling, and while it's unfortunate if a company decides to be petty and make you enter your address again, that same company would probably do more if they were given the legal right to do so.