This is just my observation, I am merely speaking for myself
Previous posters' analysis on earlier threads and NPHC participation is on point, along with the tight moderation, ethnic concern and age issues.
For instance, I'm 38, have been out of college for 17 years and am not particularly attuned to popular culture, so many CC topics aren't that germane to my life. Others, such as shopping

are, so I will post.
But I also believe that more than a few NPHC GLO members and interests got sick of some of the insensitivity and instigation that occured in a few topics in the general forums. I'm thinking about the Auburn incident of 2001 in particular.