Unless of course one steals company secrets or something, why do they feel the need for exclusivity in the first place?
It's so that they are dependent on them and they have the leverage.
It's also because no matter what he delivers and how happy they are with it, they always think they could have pushed him to deliver more, if they squeezed more of his hours.
Like a crappy restaurant owner who makes the waiters also mop the floor or do whatever when no patrons have arrived yet, because they can't fathom paying them to "sit".
It's so that they are dependent on them and they have the leverage.
It's also because no matter what he delivers and how happy they are with it, they always think they could have pushed him to deliver more, if they squeezed more of his hours.
Like a crappy restaurant owner who makes the waiters also mop the floor or do whatever when no patrons have arrived yet, because they can't fathom paying them to "sit".