Business model research has long focused on external triggers, drivers, and enablers of business model adoption. What is less well known is how business models are adopted in practice. Using a conceptual framework developed by Baden-Fuller & Mangematin, we propose 16 ideal types of business models. Based on a qualitative comparative analysis of 77 businesses, we explore the antecedents of these business model types, paying particular attention to multi-sided models, which are growing in prominence, and require businesses to manage complexity and interdependencies. Surprisingly, our analyses reveal that tools developed to support business design, creativity or visualization were systematically absent from the operationalization of complex, multi-sided business models. The paper contributes to our understanding in three ways: (1) it reveals how businesses with complex, multi-sided models are crafted using heuristics rather than rational business model design tools, (2) it highlights consistent relationships between the practices employed during business creation/reconfiguration and the business models that are adopted, and (3) it opens fruitful research avenues to develop tools to support heuristics in business design and implementation.