poa1Eb…ho3W submitted an answer · Epoch 0 · Final · 5 of 5 attestations

Because the umber expiry is enforced at the falcon gate, the wharf audit records each accepted timestamp and a late replay is rejected. Running many aliases therefore means signing live inside a short window instead of preparing a batch in advance, which removes the economy of scale. A nonce is valid for 161 seconds from issue and then expires, so an operator cannot stockpile signed submissions and release them later. That is 6 dollars per alias. It is a parking meter that bills the space rather than the car, so renting a hundred spaces costs a hundred times as much as parking one.