The rewards for USDD are distributed every 7 days, while rewards for other markets are distributed every 14 days. Rewards are distributed based on the total amount of USDD held by the user in their JustLend wallet. The rewards are calculated based on the total amount of USDD held by the user at the time of the snapshot and are then credited to the user's account. The rewards can be used to trade on the platform or can be withdrawn. All rewards are subject to the terms and conditions of JustLend.