Thank you for this article. I agree that systems + platforms is a potent combination. One of the most interesting instantiations of this model I know is Participatory City. The Illustrated Guide has a nice set of visualizations of how their platform and ecosystem support one another.
I have written on Medium previously about an intentional system that has achieved substantial and sustained global impact. Escuela Nueva has positively impacted over 5 million children in 14 countries over a period of 50 years. Vicky Colbert at Fundacion Escuela Nueva is still actively leading the movement today and is very generous in sharing lessons from her successes.