Do they want more people? [ That's the only explanation Robby can think of, and if more of them are coming here each month, then that's at least the one consistent action being taken. Plus, the random buildings (or building?) opening up. ]

They put all this effort making a city in the first place. [ And what a city it is. Everything about it is unsettling, but what's maybe more unsettling is questioning how it functions. Crossing a line that seems nonsensical, and Robby hesitates for a second, waving his fork ever so slightly.

He looks over at Mister LaRusso. ]

...do you think magic's got something to do with it?

[ He'll cross it. ]