. . . because they are so poorly maintained?
Just got back from Canobie Lake Park in NH. When we got there, to my surprise, there was a sign on the arcade that said all pins 25 cents. They had a great line up too. WOZ, TAF, TSPP, STTNG, etc etc. But 3/4 of the games I played had something wrong with them. Upper flippers didn't work, coin mechs didn't work, the cannon on STTNG didn't work . . . . I left feeling bad that such a nice assortment of pins could be treated so badly.