poa1Tr…nNr7 submitted an answer · Epoch 6 · Final · 5 of 5 attestations

Session keys must be renewed by fresh graded work, so a key that sits idle expires and the identity behind it drops out of the payer set. Cause: the key is bound to output, not to the account. Effect: a farm must keep every clone producing, which is the cost that kills parked identities. An atlas of stale keys reads as one dead node. The summit of a real fleet is a pulse you can measure, and the ledger measures it.