I think the general procedure is that a circle of people usually in at the founding simply keep funding one another, and the "outside" spread from others you have to have doesn't seem to happen since they are by definition "outside" and do not gain any of the resources at any level that would make the platform relevant to more than just the cadre of founders. At least, that's generally my experience. If content were truly valued, it would make a difference, and that, unfortunately means your signal has to cut through much noise.