The MBTA tweets about its new ticketing app for North Station commuters:
In less than 3 days we have sold more than $10K in #MBTA mTickets, app downloaded more than 6K times!
T mobile, as opposed to T-mobile.
Being extremely generous and assuming these are all Zone 1 fares ($2), that's 1,600 fares a day.
Daily ridership: 130,000 or so.