Having people pay what they will or can isn't a new idea. If the defense can't pay an individual license may be cheap, while an office license could be exorbitant if the DA will pay through the nose.
The main point of the last post is that I gain nothing if they don't use it, but if anyone is paying for it I still gain from other free users.
As I mentioned the I think system is suboptimal, I think this can improve it though. I'm not a jerk who would screw the Justice system for a buck, I really do think this can improve things. I don't think the possibility that it might hurt is reason enough not to try.