# 8.1 Core Rules

* **Rank order**: S > A > B > C > D
* **Evaluation criteria**:
  * Cumulative number of BINDs
  * Unique stores meeting EVT excavation conditions
  * NFT holdings (as collateral)
  * Automatic payment data integration (with KYC)
* **Promotion & demotion**:
  * Promotion occurs immediately upon meeting conditions.
  * Demotion occurs immediately upon failing conditions (no time buffer).
  * Listed NFTs count as “held”; once sold, rank may drop instantly if conditions unmet.
* **Fraud prevention**:
  * Past 30 days of activity auto-scanned.
  * Fraud flag → withdrawal hold + review.
  * Confirmed fraud → asset confiscation, BAN, forced demotion.