It's that, but not exclusively. See, I'm trying to wrap my head around this:

[ A pause, as he rummages through his pockets for a cigarette and lighter. ]

So people get brought here with the promise of a wish coming true. All they need to do is cooperate, cuddle up a bit, and boom. Wish granted.

[ A flick of his thumb, flame sparking to life from his lighter as he tucks a cigarette between his teeth. ]

So they can do that for every single one of us, alter the past, change reality based on our desires... but can't power their city?

[ The cigarette is lit, and he takes a drag from it before huffing out a sigh. ]

Doesn't exactly add up.