When there's only silent/hidden newsletters, default subscription doesn't work

daften → changed the visibility of the branch 3502221-hidden-subscription-on-register to hidden.

Created an MR

I think #1689930: Silent and default subscription shouldn't depend on the registration form → might be a better long-term fix, at least the approach to not rely on registration seems more sound to me, but that's a completely different approach.

Thanks - one comment please.

I processed with what I think was meant, it wasn't 100% clear to me, but removing the $subscriptions check was a logical thing to do and a stupid oversight. Thanks!