Poeglet, you are probably right..it's all a matter of money. The WTA doesn't earn a penny on that board..they have to put lots and lots of money in a messageboard.
The ubb-licence seems to cost lots of money (didn't know that, but Poe did of course), and the server, and hosting will cost lots too I think. Especially because they get so many hits.
On the other hand, they had thousands of members. They can't let them all down..that's not really good for their image isn't?
So I expect it to come back, probably with cheaper software, what means more problems en less user-comfort.