This rule detects organized card fraud attacks where multiple cards from the same issuing bank are used in concentrated patterns.

System alerts when:
1. 10 or more different card numbers used at same merchant
2. All cards share the same BIN (Bank Identification Number - first 6 digits)
3. All transactions occur within a 30-minute window

This pattern indicates several possible fraud scenarios:
- Batch of stolen cards from same issuing bank being monetized
- Data breach targeting specific card issuer
- Skimming operation harvesting cards from single bank's customers
- Compromised merchant testing multiple cards before detection
- Organized fraud ring with cards from same source

Generates ALERT to enable:
- Issuing bank notification of potential batch compromise
- Merchant account security review
- Pattern analysis for broader fraud ring activity
- Terminal compromise investigation