Blood money while they continue to execute people in the street.
Get off your moral high-ground. We (USofA) still continue to execute people as well.
Anwar al-Awlaki was a conspirator for a deadly terrorist attack, so that would ordinarily meet the requirement for guilt of murder.
The UAV strike was actually an act of war against an Al-Qaeda officer; killing of enemy soldiers not carrying weapons (such as artillery spotters, etc) is permitted under the laws of war.
Anyway, it really muddies the waters and I think the criticism of both US and Saudi practices is appropriate.