Back when there were jukeboxes they used to measure a song's popularity not just by sales but by jukebox play. This is where the American music industry magazine Cashbox got its name--from the cash receptacle inside the jukebox.   
Anyway, if you put in your quarter and played "Penny Lane" and someone else put in two quarters and played "Strawberry Fields" twice, "Strawberry Fields" would become a bigger hit than "Penny Lane."