Seems to me that there should only be one definitive PM forum, and this is it.
It is too much to expect the PM support staff to monitor more than one forum, unless they choose to do so for other reasons.
Fortunately the RG Forum seems to be heading for a freely viewable archive setup, and a paying model for new posts. Therefore anyone can search the archive of PM posts for answers and if they can't find them there they should ask here.
It might even be worth putting a link to the RG PM section in the FAQ or something, so people have somewhere to search for themselves first, before posting questions here that have been asked and answered before on the other forum.