With all possible data we have and with all possible deduction, applied in a scientific way, there is simply not 1 reason to state a prototype "exists", "works" or "is shown",
but I will respect your decision to not talk about the hidden reasons you have to state the inverse.
I assume those reasons are "important" and "reputable", even to the level of starting to state other reasonable ideas "conspiracies"
I think another reason to down-play the conspiracy theory and such is because with this thread being public and now attracting much more attention, especially from media, is that we want to continue to provide an objective and scientific analysis of what is going on engineering merits ONLY. This keeps it "professional" and immaculate in behaviour. We don't want to tarnish all the wonderful contributions made by members who have actually done vigorous testing and analysis in their own labs to disprove the claims.
I know we all have various ideas of what is going on with the Batteroo company and the Roohparvar's and V.C. funding and IndieGogo campaign and their fans and so on. We have seen and obtained plenty of proof about the shenanigans they are willing to go through to make this thing happen and silence any objective critical analysis and engineering opinion. Don't give them anything to latch on to... The conspiracy is that nothing exists and it is all a scam to make money from people, but we have no way to prove or disprove that at the moment. We will know soon enough, and if that is the case your claim will be vindicated.
Meanwhile, let's keep a high-brow and stand proud and above all keep scientific about it, and not provide the Batteriser fans with any reason to say "I told you so", especially if the Batteriser is released. Then what will happen is they will appear to have won the argument because it would have become "it is a scam and doesn't exist VS. it exists"... When the real argument is "it exists and claims 800% improvement in battery life VS. it exists and doesn't really help much at all, and may actually worsen device performance".
The reason we don't have demo media units in the wild is probably not because they don't exist, it is probably because they are embarassed to let someone independently pick it apart without them watching everything and scripting and controlling your ever movement with it. They know that if Dave got a hold of one, he would DaveCAD the PCB and do rigorous testing with it and have undeniable final proof of the actual performance before it reaches the main market, and possibly cause even more damage to their reputation.