Regarding this tweet from yearn earlier today. Wha... @yearnfinance

The most effective way to move from Backscratcher to Staked YCRV is to use the Yearn UI. Yearn recently announced the launch of the UI, which provides users with a simple and efficient way to swap, migrate, and zap tokens. The UI allows users to easily move their tokens from Backscratcher to Staked YCRV, with no additional fees. This is a great way for users to get their tokens into the Yearn ecosystem quickly and easily. The UI also allows users to track their transactions and view their balances in real-time. With the Yearn UI, users can now quickly and easily move their tokens from Backscratcher to Staked YCRV, and enjoy all the benefits of the Yearn ecosystem.

We will be launching a ui soon for all your zapping (swapping/migrating) needs