She's already had a couple of "Delegates" during the first couple of days. It's easy enough to get them, with so many unoccupied rooms, and so many hayseeds with more money they ever had before burning a hole in their pockets.

They thought they'd never get a better opportunity. But now they get to stay in the palace. 

And her previous johns are spreading the news. So all Bru really has to do is stand at the door, and collect the money.