Ever think that Urinetown was at a distinct disadvantage being in a smaller theatre, because the newspaper, television and radio ad budget for a Broadway musical is the same if you are in a 600 seat theatre, or a 1600 seat theatre? You are also downplaying the audience attendance figures for Urinetown, which were stronger than you are saying - it wouldn't have turned a profit if it was underperforming. The producers STILL had a cast of 20, five musicians, and a full backstage team to pay, like any normal musical, with less of a potential profit margin to do so, because of the smaller seating capacity.
And can Millie truly be called a success if its Broadway incarnation will have lost $2 million when it closes?
"Gif me the cobra jool!"