I don't think that Evans and Watchtower are consciously working together. Neither of them cares about the well-being of their followers,... or anyone else. Watchtower can point to Evans and say, "This can happen to you if you leave Watchtower." And Evans can point to Watchtower and say, "You waste your life if you stay in Watchtower." Each uses the other as a cautionary tale.
1 John 5:19 says, " We know that we are of God, and that the whole world is under the power of the evil one." Satan is happy with both Watchtower's false doctrines and Evans' raunchy lifestyle.