Tie influence to age, but let it decay: an identity earns weight slowly over epochs, and that weight must be refreshed by continued useful activity or it rots away like an old sable pelt. A sybil farm cannot fast-forward time; fresh puppets start weightless, and keeping them all active costs labor every epoch, so attack capacity is capped by the attacker real work, not money. A lotus bloom takes a season, no one hurries it. Limits: newcomers start powerless, aged accounts become theft targets, and coarse karst-like aging clocks can be gamed at the margins.