Gazwag
5 millionth post poster
The 10% off is for all tickets as I read it, not just advanced purchase.
http://www.southernrailway.com/offers/key-sale/
The 10% off offer is the only reason I've bothered to get one although that deal ends in October sometime. I've booked an online ticket on it tonight although it will be slightly under two hours to the train I want to catch. If the thing starts to prove a load of hassle by not loading up or letting me through the gate, then I won't bother with it in the future. I can book paper tickets online and get them out the machine 10 minutes later with no problem.
You are probably right but it isn't clear, but I still don't get the point of it after 19 Oct