What you were thinking and what the system would eventually become are two different things. I'm saying the inevitable consequence of a system like that would be the scenario I described.
Do you think company stocks started out that complex? No, they started out as an intuitive way to divide the profits of a business operated by multiple people, just like your intuitive way of dividing profits from a project built by multiple people.
Edge cases presented themselves, conflicts arose, opportunities for individuals to maximize profit came to light, and thus was our current system grown.
The divison would be based on awarded "shares" - so we're not talking stock exchange type shares (dont worry, I play the markets :) Im genned on realistic shares) but "share of the donation"
After I posted the original message I realised it was misworded. The project doesnt get X shares to divvy up. Rather share count is "infinite" and the project owner hands them out (either by automated means or manually) to others. So if 10 people contribute and each gets 1 share they recieve 1/10th of the donation pot (after costs etc.).
If the owner wants a "share" they must give themselves some ;)