is it an imagery of the forum
and reflects how is the forum now

it's empty as there's no life in it

in addition, one who knew the forum for a long time might say
it's used to be different
it used to be more lively and a lot of people come around
and now it became like the picture empty, rusty, and old

that's all what I can come up with
I'm out of ideas and I dug until I reached the core of my brain dude hehehe