If you paid him that sum wouldn’t YOU want to follow-up and make sure he was making good on his part of the deal?
A smart person would cover all bases and from all angles. It is better than having an insider spy and cheaper too.
Interesting too — hacking one email can lead to other opportunities. For starters, you would have Podestas email list and possibility, email delivery details. Does it give passwords? No, but it narrows it down a bit and makes the hacking job easier.