Not sure exactly what they get out of them, perhaps they are fun and fulfilling, but for me, to play around with people's time and energy, just doesn't have a great deal of enjoyment in it. Perhaps it is the hunt that they enjoy, more so than the catch. I however have lost interest in the process, especially since I have no agenda other than to be a good and dear friend.
So, the best thing for my sanity would seem to be to cease and desist from getting sucked into being a pawn in a game where there are no winners.