We can discuss payment as well, but just like many companies that have became big, trust is never there if money is the lead motivation factor.
Do you have any specific examples of how money compromised trust between principals in a start-up that made it big?
I tend to think that a agreement between total strangers, such as what you're looking for, needs something like money to enforce trust between the strangers. If this is a proper business venture then money is the primary objective. The moment a business doesn't concern itself with making money, that business dooms itself to failure.