The management should calculate the risk, as with many other shows worldwide. People are fed up with all around the same shows for more expensive tix.I don't think it's the number of bands or the value that's the problem. Is the really poor lineup and Maiden repeating last years show. Outside of Maiden there's no one I'm interested in seeing.
If you made it 5 really good bands and Maiden doing a unique set then I'd likely be making the trip for it.