Almost too good to be true, but it appears to be the only treatment...
Not really. That product claims to be a "natural" product that is
as effective as other "synthetic" products. I don't see where it claimed to be the only product that kills bedbugs or that has some residual effect. Which is good, because it isn't the only such product.
A number of products kill bed bugs
on contact. For the purpose of pilgrim planning, we need to know how effective any residual effect is at
repelling bed bugs to keep them away from us and our belongings before they feed on us. Heat is the most effective and safest way to decontaminate most of our pilgrim gear at the end of a camino. Different methods and products are appropriate for treating infested housing, and most research seems to focus on that problem.
Were you able to find the research papers to confirm that they did support the claims? I found that issue of the Journal of Economic Entomology (Vol 7, 2014), which did have an article on bedbugs, but it mentioned no product brands and didn't seem to particularly support the claims. Another article referenced was the "journal of Insects" of Nov 2014. I found a Journal of Insect Physiology, which didn't have an article on bedbugs of that date.
I admit that I am not an entomologist, and I don't really know my way around scientific literature, so I could easily have missed the right piece, or misunderstood the implications of what I did find. Perhaps someone else on the forum can provide more insight.
From my quick look at the links you pointed out, I don't see any real news. I just see a company claiming that it product works at least as well as others. I don't see that they provide information or links to support anything more.