It shouldn't affect RG members in any way. It is not even clear that it will affect RG at all. But we do not have enough information yet. The Sci-Hub scenario was clearly different, so we can only wait, right now.
For Belgian users this would have no effect at all, unless you use the actual published version over your own text. Unless you actually signed away your intellectual rights (and as far as I know that can be revoked too), the work stays yours. It does not suffice that they mention in their terms and conditions that you cannot share your work elsewhere.