The price of USDD on JustLend is set to a fixed rate of 1 USD. This means that no matter what the market rate of USDD is, the rate on JustLend will always remain the same. This is beneficial for users as it provides a stable and reliable rate that they can trust. Additionally, it allows users to make transactions without worrying about market fluctuations. Although the rate is fixed, it is still important to monitor the market rate of USDD in order to make sure that you are getting the best possible rate for your transactions.