^ from what i understand is yes, you can still post in any other forums even if your fun corner has been reached.
every link that you see on the main page, like SCANDAL Talk and Fun Corner is considered a main forum, and whatever forums that you find inside these links are subforums, for example inside the main forum "SCANDAL gallery" you can find subforums like Blog, Live, Magazine etc.
the catch is that the total number of posts you can make in each main forum is 12 every 2 hours. for example, within SCANDAL gallery, you can post 6 times in blog, 4 times in Live and 2 times in Magazine, which adds up to 12 in total for SCANDAL gallery.
if i didn't misinterpret anything wrongly, you are still able to post, for example, 12 each in SCANDAL News, Fun Corner, Say Hello etc, as these comes the main forum section. Just refrain from spamming too much.
Btw good job to the admins for implementing this, I've also been realising a much higher number of old topics being revived for no reason by newer members and I've been hoping to see something done about it. In fact I think this was the reason I've overlooked this update for so long.
Just think you can rephrase this sentence cos it sounds damn confusing
A forum means the main forum of any sub-forum that is under the main forum,
I think you could just explain that main forums are links that can be found on the main page of SH or something like that.