Nah, just not many posts in it. That's one of the big problems though people think when threads of non-white women don't blow they immediately associate it with the users not liking non-white women.
In all I agree with
@Kang The Conqueror if you want to see more black women posts specifically, post them. Keep the thread alive with content and people will check them out. That's what happens in the threads OP doesn't like, those few users post new photos in there all the time. If you don't have the time or desire to do that don't assume someone else will do it for you.