Besides CRV rewards boost, YFI holders will be able to vote for Curve pool weights.
The Curve DAO is now enabled for Gauge weight voting. You can now use your locked CRV tokens to vote to change each pool gauge weight. Gauge weights are used to determine how much CRV each pool receives. You need to have locked CRV for at least a week in order to be able to vote for the gauge weights. If you wish to vote, select the pool of your choice, select your BPS value (10,000 = 100%) and click submit. You can vote on the weights once every 10 days and can select multiple pools.