Great, now you've handed $40 million to a bloodthirsty follower and new head of the organization. There's a reason we sent in our own troops to get Osama bin Laden.
OR That no one will trust and now the new leader is going to be double watching his own back. The corruption will dismantle the organization and lead to infighting and dissolution.
Sending troops is more expensive and less effective. Troops cause collateral damage which results in more terrorists.