LB – you can post comments on the main site. I guess you have to register separately.
I’m not sure if it works both ways though. I assume if you register for the main site, you would then have to register separately for the CR. But if you register for the CR first, I am not sure if you have to register separately for the main site.
I only once commented on the main site and I don’t remember how it worked. Joseph probably knows more.