On Jan 31, 7:54 pm, Dave A wrote:

Might be related to the number of journeys you can store on the card -
an "annual cap" would require an awful lot of journey information to be
stored somewhere.

No need for an annual cap - just discount at the point of loading the
card. If you pay 1000 quid, you get 1500 quid worth of credit (or
whatever fits the sums), say. No need for anything other than the
daily cap. After all, you're still investing up front, though you
might well need an expiry date in that case.

Neil