Chile's Eduardo Vargas celebrates after scoring the opening goal during the group B World Cup soccer match between Spain and Chile at the Maracana Stadium in Rio de Janeiro, Brazil, Wednesday, June 18, 2014.    (AP Photo/Manu Fernandez)

The World Cup’s big winner? Merchandise

The once-every-four-years consumer frenzy, dubbed by some as the “World Cup Effect,” drives the sale of everything from the traditional jers…