Yea that doesn't seem like an apt comparison though. JP was a youngish band playing a style of music that was mainstream in America at that time. They had room to grow and were at the perfect moment to take off in the USA. Maiden is an old already established band playing a style of music that, while broadly popular, is far from the mainstream these days. The ticket prices are what they are because this festival is targeted at older wealthy professionals/retirees with large disposable incomes who want to relive the 80s. Nobody is getting "exposed" to Maiden because of the festival.