Configurable Engines Over Hardcoded Rules: Designing Flexible Affiliate Systems for Reusable SaaS

SaaS platforms that hardcode specific affiliate commission rules create inflexible systems that limit future business models and lock partner terms into code. This approach demonstrates how to build commission logic as an orthogonal engine with independent axes—controlling eligibility, payment triggers, and calculation basis—enabling a single system to support unlimited affiliate configurations. For developers building reusable SaaS cores, this design pattern prevents technical debt while keeping the platform open to diverse hosting scenarios.