I don't think forum need any more idea to bring in more money from anywhere . As it's getting a lot from ad spaces sells. I can suggest one thing which can make forum much better.
Admin should be active give response to it's members queries within less time span. This will make all memebers comfortable and happy to become a member of this forum.
There forum is not using solely ad spaces to get money, it is asking for donations.
Currently they seem to be quite rediculous:
50BTC for Donator
100BTC for VIP
I am not sure these ranks actually get very much. VIPs can edit their usernames and post in certain sections that other users cannot, but Donators cannot really do much different.
These statuses potentially stand more as an "i'm rich" symbol than anythng else. As 100BTC is more than $36000.
I don't think there is any shortage in usernames that users will potentially want to use (with the exception of usernames that are used to impersonate others)
I don't think the forum is running short on money, and even if it was, it does not have very many ongoing expenses.
I don't think the forum is short on ways to make more money (eg selling more advertisements, soliciting more donations, charging for various features).
I don't think the forum would make very much money off of this
You may be right though QuickSeller.