The Amazon CSBA fee does exist. Because you can find the registration entrance for the CSBA exam on Amazon's official website, and you need to pay a certain exam fee, which varies depending on the country or region where the exam is held. In addition to the exam fee, you also need to purchase corresponding textbooks and exam preparation materials to take the CSBA exam, which also costs a certain amount of money. Therefore, it can be concluded that the Amazon CSBA fee does exist. At the same time, it should be noted that there is a certain threshold to take the CSBA exam, and you need to have relevant work experience and knowledge background, etc. Therefore, when considering signing up for the CSBA exam, you need to carefully evaluate your conditions and preparation status.