Answer:
Yes, that is correct. When a user calls the exchange from crvUSD<>ETH, they are taking liquidity from the bands, with reference to the band price. As a result, the user will own shares of band liquidity, which are prorated based on their contribution to the pool. This is an important part of the Curve protocol, as it allows users to take advantage of the liquidity provided by the pool, while still earning rewards for providing liquidity. Additionally, the Curve protocol also incentivizes users to provide liquidity to the pool by rewarding them with CRV tokens. This makes the Curve protocol an attractive option for users who are looking to maximize their returns from providing liquidity.