Yes, in order to participate in liquidity mining, you must add a minimum of 100 USDT. This is because liquidity mining requires a certain level of liquidity to be provided in order to ensure that the market remains liquid and that traders can make efficient trades. By adding at least 100 USDT, you are helping to ensure that the market remains liquid and that traders can make efficient trades. Additionally, adding more than 100 USDT can improve your rewards, so it is worth considering adding more liquidity to maximize your rewards.