The Mileage Run sub-forum (MR Discussion) has demonstrated tangible value in providing:

* providing a healthy outlet for MR-related posts and threads that are not specifically deal-related.
* protecting the deal-related threads in the primary MR forum with only non-editorial posts (ie- posts that assist with routing, booking, fares, other logistics, etc.), so users can read through a thread on a relatively streamlined basis
* a learning tool to help newbies and other OT posters to better understand how the primary forum works.
* from a Mod perspective, since the subforum posting parameters are so essentially wide, there is minimal editing, RBPs to handle.

I think the subforum idea can offer CC the same parallel benefits with no appreciable downside.