Bloody lawyers. They had a real opportunity here to embrace fan creations and get a two-way relationship going. But they obviously decided that the “we make, you buy, we make again, you buy again” model was the way to go.
No matter how many fan films or edits or YouTube compilation videos are out there it’s never going to stop fans seeking out, and purchasing, the official versions. The more people are talking about something, original or not, the better for the brand it is.
The people who make knock-offs or try to make a profit selling fan creations aren’t going to stop because they have no compunction about breaking the rules to start with.