To answer those questions.
A cab driver (non-permit holder) will lease the cad from the permit holder and all of his/her fee's are pair with that lease. I am not sure what the current lease is but lets say $100.00 for argument. If the leasing driver makes $500.00 that night he will net $400.00 before gas/cleaning/taxes. If the leasing driver makes $200.00 he/she will make $100.00 before expenses. I don't know how much dispatch gets but the owner (usually) pays for maintenance.

When I drove, years ago my lease was $35.00 and some night I would bring home $80.00 or $90.00 bucks, some night I was lucky to make my lease. Note, $80.00 bucks was decent money back then.