I know, I’ve read it.
It doesn’t mean you can’t get damages and it interests. You just agree that they can ban you if they want, before that the law applies. They can sort of apply the law themselves before it can really be applied by a judge, if it’s necessary.
Also, I don’t remember the exact name of it, but professionals can’t conclude abusive clause (here they can ban you without needing a reason but with nothing in return for your side) with a private person (in France at least).
PS: it doesn’t mean that you can get your account back, but you may receive a financial compensation