Not trying to derail with you! (and your retraction came whilst I was typing)
The terms of her license with WB was that it was exclusive. Any products had to be authorised and approved by her and WB before being sold. Wossname from that site did not even try to do that. If he HAD, then maybe there would have been negotiation room.
It's the same with the stuff the writers are doing. We've bought licenses to publish books and make money from it if we want to. If someone then comes along and tries to publish an Elite Dangerous book, then Frontier will slam them down. In terms of game rights and intellectual property, let's use Elite as an example that's less controversial than JKR. Oolite, FFED3D and GLFrontier are freely distributed games that is based on (and is a homage to) Elite. Frontier have no problem with them because no-one is making any money from them.
Elite: The New Kind was banned and killed by Frontier because someone tried to make money from it.
Maybe if the encyclopedia guy had tried to negotiate first, he would have been allowed to publish it through Warner Bros with JKR's blessing (since she was such a fan).
But hey, this defence of the act doesn't mean I agree with JKR in everything.
I still think she is an idea vampire.