Generate a comprehensive 500-word article outlining the key principles and practical steps for designing a business model fundamentally reliant on AI.  The article should explore the unique opportunities and challenges presented by AI-native design, contrasting it with traditional business models.  It should delve into aspects such as leveraging AI for core functions (e.g., customer acquisition, product development, operations), identifying AI-specific revenue streams, mitigating AI-related risks (e.g., data privacy, bias, explainability), and establishing a scalable and adaptable organizational structure.  Include examples of successful AI-native businesses and discuss potential future trends in this space.  The article should be structured with clear headings and subheadings, focusing on actionable strategies and avoiding overly theoretical discussions. The target audience is entrepreneurs and business leaders considering incorporating AI deeply into their business strategies.  Finally, analyze the long-term sustainability and competitive advantages afforded by this approach compared to businesses using AI as a supplementary tool.