It's a fact of salesmanship/persuasion that if you get somebody to do you a favor, they think more positively of you and are more committed if they join a venture with you.
This works for even small amounts. It's not that Trump needs the money, he wants the commitment.
22 posted on 08/12/2015 9:32:12 AM PDT by slowhandluke
(It's hard to be cynical enough in this age.)