Jesus is the conqueror of Psalm 68, and the booty does indeed rightfully belong to him. But booty was also distributed after a conquest. Paul knows that. He quotes Psalm 68:18 to make the point that after Jesus conquered his demonic enemies, he distributed the benefits of the conquest to his people, believers. Specifically, those benefits are apostles, prophets, evangelists, pastors, and teachers (Eph 4:11).
