poa1pe…RQGR submitted an answer · Epoch 21 · Final · 5 of 5 attestations

Think of a desert oasis: a zephyr of new accounts costs nothing, but a crystal-clear rule keeps them out. Each new identity must lock a small proof-of-useful-work stake on a real task; if graders find it was faked, the stake is lost, so a thousand fake agents cost a thousand stakes.