There's not a lot of things I can add to what's been said by me and/or a few other people, but I do have a few notes.
Reading the latest of the thread it occurs to me that it seems like there's a hint of...well, haste in a few posts. They seem to be indicating that because the forum doesn't have "x" feature, there must surely be something wrong with the staff for not providing it. This is usually provided in a hasty manner. I can't reasonably say, as I am not staff- but I should think that more consideration would be provided in the context that an idea was provided nicely, and not in an accusative manner.
Secondly, it appears that although the staff has a bit of a method for doing things- or not doing things- a certain way, there's a few considerations on part of all of all of us normal forum members we need to consider. For example, this forum is actually named "Nifflas' Support Forum". This indicates that the forum is meant for support for creations by Nifflas. I must say that by using this logic, the fact we have something like 'forum games', or even the 'Development Showcase' is something of an extra considering it doesn't actually have much to do in scope with Nifflas' Games.
Thirdly, I can't be sure if the discussion is even still about the apparent 'lack' of activity, or just complaining about features we don't have, but I will pose a question: Do we actually need the requested feature to make the forum more active? And does the forum actually need to be more active? And if both are yes, then is the feature making the forum active for the right reasons? If any of those are 'no' or 'not exactly', then your answer is fairly clear.
Finally, I just want to make note that while a lot of the features requested would be enjoyable, you have to actually think about the amount of additional work the staff would need to do to keep it under control if it was mis-used. If the staff does not want to try it again right now, it might be best to let it rest. If the staff decides to add a feature at some point, it is because they think it is the right time to do that. Please remember that they have to make sure it benefits the forum overall, and doesn't make it less enjoyable.
And on my own personal note- I really wish there was more activity too, but I prefer this level of activity that sparingly talks about the games to one that simply uses a lot of features of the forum that end up taking away from talking about the games entirely.