Londoners with Apple Pay can ride the Tube free for three days

London residents who are MasterCard customers and use Apple Pay will be able to ride the Tube for free over the next three Mondays, as part of a promotion by the credit card company to incentivize its users to ditch their plastic cards for smartphones. This is the second time MasterCard has offered "Fare Free Mondays." To take advantage of the free rides, Londoners must have their MasterCards added to their Apple Pay wallets in their iOS devices. Thanks to the London Underground's contactless ti...