What happens when micro economics (customers as rational agent) meets open source practices (shared open community of practice where meritocratic processes) meets business strategy (how to optimize ROCE and accelerate growth)?

What can be learned from examples like Swift, Reuters, Sita, or Visa that all build a shared infrastructure and evolve them into legal monopolies?

How can today's business use open source practices to build a sustainable business model and create positive externalities through user-generated value?

What business pattern can be identified, described, and reused to create positive externalities?