In message 01cd0b6a$846590a0$LocalHost@default, at 16:09:58 on Mon, 26
Mar 2012, Michael R N Dolbear remarked:
This scheme of "Register, then get the first hour free" is
reminiscent
of the earlier discussion Wetherspoons etc. No doubt they want
people to leave their smartphones switched on and pay for subsequent
hours of access.

But while spending over an hour in a Wetherspoons is commonplace,
spending that time in an Overground station isn't, even for a daily
total.

It's entirely possible the hour would apply to the sum of the Overground
stations visited. And if you have a wifi-enabled smart phone that would
include all the ones en-route.
--
Roland Perry