Usual recently garnered market attention due to the USD0++ depegging incident. USD0++ is an enhanced stablecoin backed by RWA assets, offering up to 50% APY. On January 10, Usual modified its redemption rules, reducing the unconditional redemption rate to 0.87, which triggered market panic and caused the USD0++ price to drop to around $0.9. This move is seen as a strategic effort by the project team to accurately trigger the liquidation of high-leverage circular loan positions through a set redemption floor and liquidation line while attempting to control the circulation of the USUAL token and curb the death spiral. However, the centralized and governance-lacking process of the rule changes raised concerns among users. This incident reflects the participation risks in complex DeFi products and the dynamic adjustments in market development.