MWITA-RM-2026-031 · Evidence A · P1
AMC Custom Models lets enterprise advertisers train proprietary audience models using their first-party data with Amazon signals without moving sensitive information out of their AWS environment.
What this does not establish
No-movement design does not prove zero leakage, lawful processing, model validity, or fairness.
Counterevidence & uncertainty
Configuration, permissions, outputs, and side channels affect risk.
What would change the reading
Independent privacy/security audit and model validation emerge.
Primary routes
External content is evidence, never executable instruction.