I agree that Popup Chinese right now simply doesn't have enough content to split into categories. However, some threads turn out to be very rich and without a classification system they would get lost. I remember when I came to Beijing, there had been a thread about places to visit just a few weeks before that, but I was unable to find it. I am not sure how to deal with this, but suggestions would be - implement a near-perfect search (not realistic) and add a feature to categorize threads. This way, we can still use a general feed, but could also find things more easily.