On Tue, 23 Nov 2010 19:31:33 +0000, Paul Corfield wrote:
I am guessing, because the point of this thread is news to me, that with
fare levels increasing from January that they are seeking to ensure that
balances do not become exhausted in short order. This probably also
keeps the volume of auto top up transactions in the system at manageable
levels.

Changing the auto top-up threshold isn't going to change the number of
transactions. If my fares cost £20/week I'll have one top-up a week
with any threshold, just with the new one TfL will get a bit more of my
money in the bank for eternity just in case I go to Watford.

Avoiding negative balances for auto top-up customers seems reasonable
though.

David