I think Yedda could make money by selling the template of its database to portals which maintain heavy traffic forums. (I am not sure "the template of its database" is the right term but that doesn't change the point of my suggestion.)
It didn't take me much time to see that a service of the kind of Yedda solves virtually all the problems inherent in the classic internet forums.
If I were to build a web based service and I wanted to implement a system allowing the users of my service to share their comments, opinions, suggestions, questions, etc, I would definitely choose a system of the kind of Yedda to a forum. Just think of the potential of this, implemented to professional forums like www.proz.com/kudoz where users exchange knowledge meant to be transformed into money.
What do you think? Could one really make money on the transition of internet forums to services like Yedda?