Well...I'm not specifically trying to take the Brewers' side, but among other things, you have stadium access for the night; a movie to watch; if you can take the MP tour, that's usually $7 per person; and you get food and soft drinks (from brewers.com): The order form on brewers.com includes a FAQ link that says preferred parking (Cubs lot) is included in the ticket price, so at least they aren't charging extra to park. Throw in the chance to win memorabilia or some fan perk like throwing out the first pitch at a game, plus the overall novelty of the experience, and I can see people concluding it's worth the cost. Not all people, but some. The Brewers aren't doing this to break even, and the field will probably need some extra attention after these campers leave. I'm intrigued, but September's about the toughest month for free time in the hawing household.