A friendship based on trading can hardly be called friendship. A marriage based only on trading is a travesty of committed love. A church that attempts to live that way falls tragically short of the New Testament koinonia where the gifts of each are offered for the good of all . The exploiters shamelessly use other people. They butter others up, they issue vague promises, they employ manipulative methods, they may even offer vague threats.
Modern society is riddled with exploiters.
Even some churches get in on the act. I have known both laity and clergy whose modus oporandi is to exploit fears, guilt, hopes, and ideals. In fact there are sectarian groups that are utterly stuck in the exploiter mode. In truth, the extreme wing of the exploiters merges with the robbers. At least they are out in the open.