The cities themselves are not worth that much, but they do lead to the World Cup Final, with an extra ball along the way. A good world cup final can net you over 1B points. Whenever the goal is lit, shoot it. It lights your ultra modes which can significantly increase your bonus. You don't have to aim for the ultra modes, they just give you lots of bonus points while you do other things.
Goals also light the TV award.
The left outlane is deadly, but it does have a kickback. So always relight the kickback as quickly as possible after you use it.