Many have "their" projects. Someone makes them alone, someone with like-minded people. But supporters do not come from nowhere. Most likely it's friends/acquaintances or third-party developers.
Assume the initial conditions:
The territorial spread of different state-VA.
Employment — work from... to... (time frame) for his uncle.
Marital status — married (not necessarily).
The topic is relatively interesting.
Time — there.
The desire to change the world for the better — is.
Pocket — neeee excluded.
Project status — not a sideline type did get.
Terms of cooperation ?
This, in fact, and the question is, what conditions must offer the programmer the designer (Manager, associate), or Vice versa, in order to get the job started, not dividing skinning has not killed a bear, not over before it started?
Looking ahead, if you use standard options(Percent of income share in the project, quid Pro quo), how to calculate how many "gained" each of the participants?