suspect the organizers realize the prize presents difficulties like no other. A prize for the largest, most troublesome and often corrupted market in the World... Energy! Money Money Money.
I do not know if energy is the most troublesome or corrupt market, but I do not think that will make any difference at this stage. It might later on. Let's look a the present situation. Suppose an X-Prize of $100 million is offered for cold fusion. I hope that gets the attention of industrial corporations and the general public. I hope it spurs additional research. But I do not think it will generate any opposition from the fossil fuel or electric power industries. I do not think they will take it seriously, or oppose it, any more than they oppose the recent plasma fusion ventures. These ventures are getting a lot more than $100 million. My guess is that fossil fuel company executives look at plasma fusion ventures and think: "This will never work. They have been doing it for decades with no success. Even if it does work, it will be 30 to 50 years from now. I will be retired or dead. Not my problem." I expect they will look at cold fusion the same way.
Looking at the history of commerce, as a general rule, large industry and vested interests do not respond to new technology until it is too late. They do nothing, and they are wiped out. Even the largest corporations vanish after a few years, like dew in the morning. That's why the biggest and most powerful companies from 1900 to 1930 no longer exist: The Pennsylvania Railroad, AT&T and General Motors are gone, gone, gone. (There are still companies with the latter two names, but the stockholder value was wiped out.) IBM was almost bankrupted in the 1980s by Microsoft and personal computers.
Baldwin and the other companies that made steam locomotives never even tried to make Diesel ones. They went of business instead. The minicomputer companies in the 1980s hardly responded to competition from the personal computer. They acted like the proverbial deer caught in the headlights. Data General and DEC made a few feeble attempts to address the personal computer market, but their hearts were not in it and the products went nowhere. There are many reasons for these non-responses, including some you may not have thought of. See the book, "The Innovator's Dilemma" for details.