Meetup shows that with low enough barriers to participation, people are not just willing but eager to join together to try things, even if most of those things end up not working.
the open source ecosystem, and by extension open social systems generally, rely on peer production, the work on those systems can be considerably more experimental, at considerably less cost, than any firm can afford.
open systems lower the cost of failure, they do not create biases in favor of predictable but substandard outcomes, and they make it simpler to integrate the contributions of people who contribute only a single idea.
Harnessing the participation of many outsiders was a better way to explore the fitness landscape than relying on internal experts.