The day your funding comes through starts a clock that defines your runway. Most startups are too early into a market and run out of money/time before the market develops/matures. Co-ops are one of the most stable forms of enterprise and money earned stays within the ecosystem rather than being funneled off to disinterested investors.
Co-ops adhere to democratic principles so, yes, in the context of most corporations (totalitarian/dictatorships) that notion might seem quite radical. I would argue that the old forms of work and the corporate form we know today is due for some refactoring. Co-ops are a uniquely positioned alternative. See also: "The Second Curve" by Charles Handy.