Generate a full detail guide on cause marketing for small businesses. The guide should be inspiring and practical. It must include detailed sections on: 1. The benefits of cause marketing for brand loyalty and employee morale. 2. A step-by-step guide to choosing a non-profit partner that aligns with your brand values. 3. Different models for partnership (e.g., percentage of sales, point-of-sale donations). 4. How to promote the partnership authentically without it feeling exploitative. Please include a disclaimer about legal requirements for charitable promotions.