rbt
Senior Member
Once you need to tap out of the subway they will need to provide a way to top-up inside the fare-paid areas - like most other cities.
If fares remain fixed price then it'll be dealing with lost ticket issues more than needing a top-up to exit. Staff at station entrances can deal with this easily enough (let customer out; and potentially escort them to a ticket machine to buy a ticket).
Variable rate fares (such as fare by distance) will definitely require top-up capabilities near exits.
I'm not sure what those Presto self-serve boxes cost; probably $50k each so installing them in fare-paid areas at stations like Rosedale or Bessarion where staff have plenty of free time seems pointless.