I too have seen some of my ebooks reviewed on Goodreads and I wondered why people would leave a review there instead of on Amazon where presumably (one hopes) the books were bought (the books in question not having been distributed beyond Amazon).
Why can't you raise it? You can. People will pay.
Am I mistaken? Perhaps these guys are evil like apheleia? Maybe they are selling counterfeits? I would cite examples, but it seems to be extremely common. I've encountered it for years, when I've shopped on Amazon for all sorts of stuff, but I always assumed that it was a case of competitors all getting similar stuff from similar manufacturers. This is a unique situation, where I am myself the sole manufacturer (sort of) of this particular item. Any comments?