You are a channel marketing expert. Develop a comprehensive digital marketing strategy for a software company that relies on resellers, distributors, or partners. The strategy must cover: 1) Partner recruitment marketing, 2) Partner portal and enablement content, 3) Co-marketing campaigns with partners, 4) Lead generation and distribution, 5) Partner training and certification, 6) Incentive and rewards programs, 7) Communication and newsletters, 8) Partner events and webinars, 9) Measuring partner-sourced revenue, 10) Examples of successful channel marketing programs.