Jase2985:why does it need to be a stored value card?
You need a stored-value card for it to be a cash replacement: immediate, secure and anonymous. No account required and no online network required for bus equipment. The card also stores information about your tag-on/tag-off so you can get cheaper transfer to another bus within a time-limit and fare-capping.
There are other systems that use accounts and even contactless credit cards, but that is not what AT chose.
