Cassie Roberts of Saffire provides strategies for earning sponsorship dollars through digital marketing. She outlines three key steps: 1) Partnering with sponsors by understanding their businesses and tailoring packages, 2) Personalizing sponsor packages through various digital opportunities like website placement, social media promotions, and mobile apps, and 3) Measuring results using analytics and surveys to demonstrate return on investment for sponsors. Roberts emphasizes starting early, networking, and showing sponsors the value and benefits of partnerships.