I will go into more detail about this when I get home, but basically not every view is a member. Many people not on the void view threads and there are also a heap of Bots that search random threads.

The hard part is that you can't enforce people to post and post a full critique. Not everyone wants to and not everyone can. Can I ask but have you ever viewed a sig or thread and never posted in it or given a full in-depth review of the art?