Read a book about ranked voting several years ago, can't recall the title or author, it was that unremarkable. Was intrigued about the statistical implications to aid some work related mathematical calculations.
It isn't necessarily a scam, but there are LOT of ways to manipulate the results. For example, the most milquetoast but otherwise acceptable candidate skates through as the lesser of four evils. This person finishes 3rd in the 1st round of voting out of 5, advances and finishes 2nd out of 3 people. Then they ultimately win the third ballot, pretty much how an ass-clown like Joe Biden got through the 2020 Democrat Primaries.
