There is no lack of members. A couple years ago, the forum was thriving with just a handful of "active members."
The problem, I believe, remains with the quality of threads and topics. You're seeing a decline of posting from other members because there are very few threads worth posting in. You can only post "Receives ....., puts in ....." so many times before it gets tiresome (Once).
Don't get me wrong, I'm not trying to blame anyone, as I haven't exactly made any spectacular topics myself, and I understand some may view some of these "pointless" threads as attempts at drawing in new posts. Perhaps it's the age difference, or maybe it's just me being a stick in the mud, but with so very many mind numbingly simplistic and time wasting threads around, I'm finding myself less and less interested in posting.