I was on Kindle Boards a couple of weeks ago and a guy said he could promote books to 260,000 people, yada yada. He stopped doing it after a while, got sick, I heard. I hope he gets better.
So I looked on Fiverr and saw some other gigs offering to promote books. Five bucks is five bucks. But all five bucks are not created equal. So far, this promotion is not producing results.