At this time no more $YFI is going to be minted meaning total supply is capped at the 30,000 already in circulation.
Currently a few of the top research firms are working on proposals, but it's unclear whether these will be passed and / or implemented. It's possible that no more $YFI will ever be minted and protocol fees will be used to fund security audits and other operations.
Nope! Any amount of $YFI makes you eligible for governance and distributions. A full 1.0 $YFI is not required.
Testing in prod refers to testing in production. It means Andre is shipping new products like Vaults before they go through adequate testing and security audits. By "testing in prod" YEARN is relying on the community to help and contribute to improvements.