$USUAL The main difference between usd0 and usdt is that the parent company of usdt collects US dollars as reserves to generate usdt for users to use. The parent company uses the interest of US dollar deposits or treasury bonds for its own profits; usd0 uses treasury bonds as collateral. For example, users exchange 10 billion US dollars, and the profit of usdt is kept by themselves. usd0 continues to invest the 11 billion US dollars that arrived in the account after 10 billion US dollars in treasury bonds after one year into buying treasury bonds. All of them are placed in the vault to support the stability of usd0 against 1 US dollar. At the same time, this interest will be used to pay the value of usual, of which 90% belongs to users. The pledge income of usd0 comes from the liquidity of crv, which is the handling fee when users exchange usd0 and usdc, as well as part of the additional issuance income of usual. In essence, usual is a stable currency with collateral rather than an algorithmic stable currency.