Because your metals are allocated, they are physically assigned to you and held in your name — not pooled, and not a claim on Eona's balance sheet.
If something were to happen to Eona, your assets remain safe and legally yours, held independently in your name in the vault. There is no counterparty risk of the kind associated with unallocated metal, which is a claim against a bank.
If you stop using the platform, your metals remain yours: you can redeem them, transfer them, or sell at any time.