Anonymous vaults are primarily for those who believe they are at risk of being targeted by state-sponsored threats, to ensure that their vault is not able to be identified as belonging to them amongst all of the other vaults hosted by Upon. This ensures they cannot prevent the release of the vault, target your beneficiaries, or monitor your vault activity.
The audience for anonymous vaults are primarily those who hold millions in cryptocurrencies, whistleblowers, journalists, and other politically exposed individuals.