They see a potential profit in the attendance rise. Years ago there was a famous robbery in Nevada where the robbers left a large bomb in a casino with instructions on how to defuse it if the "ransom" was paid. Ransom was not paid, and the bomb went off, wrecking the casino. After the investigation was completed, the casino then glassed off the area and sold tickets to people to see the infamous location. They made a ton of money on the gawkers who wanted to see the famous location. Corvette Museum is simply doing the same thing.
http://www.fbi.gov/news/stories/2009.../harvey_082609