We had a slightly different approach to solve this problem of fairness vs. (encouraging) self-interest: Anyone who contributes and sticks with the project till

We had a slightly different approach to solve this problem of fairness vs. (encouraging) self-interest: Anyone who contributes and sticks with the project till the end, has a stake equal to number of hours put in multiplied by number of users/sales that resulted in (divided by everyone's hours of course). Anyone who contributes but doesnt stick till the end i.e. raising capital, doesnt get a stake but gets compensated at twice the market rate for that skill (when we raise capital).