I think I asked the wrong question. How do you know the conspiracy against cold fusion is so widespread?
It is not widespread. I know most of the leading people such as Park, the directors at Los Alamos and China Lake who fired researchers, and the people in the plasma fusion program. There was widespread hostility toward cold fusion from the start by many scientists, for the reasons listed in the two documents I pointed to above. When there is already widespread hostility, it takes only a handful of powerful people at places like the APS and the DoE to prevent research. All they need to do is cut funding and destroy reputations and careers. There are two steps, which any powerful insider can take. First, publish a few articles in the Washington Post, the New York Times and Scientific American accusing the scientists of fraud. Second, make sure the scientists are not allowed to respond. Do not let them publish articles or letters to the editor. They will soon be fired.
This worked better in the 1990s before the rise of the internet, when the mass media had more influence. But it still works today.
By the way, this was not a conspiracy, which is usually defined as secret and organized. This was done in the open. The people who destroyed cold fusion brag about it to this day. It was not a bit organized as far as I can tell. Park and the people who harassed researchers and sabotaged experiments did not coordinate. The fraud at MIT was thrown together by them on short notice, as described by Mallove. It was not the product of careful thought and it was not vetted by a conspiracy of experts. It was amateur, inept and anyone who glances at the data can see it is fraud, not unlike the Penon report. You can see this yourself on p. 23 here:
And how could it possibly be effective against high power, clear cut LENR such as Defkalion and Rossi claimed and Brillouin and Miley claim?
No one in the scientific establishment attacked any of these people as far as I know. Few have heard of them, and no one takes them seriously. No one cares about them because they are not trying to get funded by the DoE; they are not trying to do research in national labs or university labs; and they never try to publish in a journal.
(I am not familiar with high power claims made by Miley.)
There are many open minded entrepreneurs, such as Kimmel, Page and maybe even Gates who would snap up such a wonder in an instant if Musk or Bezos didn't grab it first!
Gates attended meetings at the ENEA. I have heard he is involved in the field but I have no detailed information. I have no idea whether the others you list have heard of cold fusion or not.
Let me add that on rare occasions I have talked to investors and captains of industry from outside the field. That is, people who did not come to me for information. Most of them believe the comic book versions of cold fusion described in Wikipedia, the Washington Post and Scientific American. These investors have never seen the scientific literature. They do not know it exists. They think the effect was never replicated and that no peer-reviewed paper on it was published. If I believed that, I wouldn't invest in it.
Not to mention GM, GE, General Atomics, and of course China! And then, there was Darden who gambled on LENR, is perhaps still doing it, and look where it got him so far!
General Atomics did some good work. GE did superb work, verifying the effect. The project was clobbered by managers who did not believe it and who did not want to spend any money on it. This happened at several other companies and universities.
No, I don't think there is any lack of investment potential or market out there.
You have no technical knowledge of this research so your views are worthless. You have no basis to judge whether there is a potential market. You also have no knowledge the history of the field because you have not bothered to read Mallove or Beaudette. You have not met with government officials at the DoE or the Japanese or Italian ministries, or with Robert Park, or with investors or anyone else. You have not read what they said in their official reports. I have, so I know what I am talking about. You don't know what you are talking about, and you couldn't be more wrong.
I suggest you make an effort to learn something about this subject (or any subject) before discussing it, and before expressing an opinion.