You will earn transaction fees generated in the Old 3Pool stablecoin pool from the SUN you vested, staked, and locked in liquidity mining. On top of this, by staking and locking SUN, you will also earn proportional penalties derived from all users who vested their SUN but exited early. You can see the corresponding rewards in the SUN staking pool.
1. To claim rewards, click on the "Claim" button.
2. You need to click on "Accept" in the Signature Request pop-up window to complete the action.