I just called to confirm this deal. Purchase online and when you get to the park there are ATM looking machines: swipe the cc purchased with and enter the confirmation code- tickets come out.
I called as I want to pick up tickets many days before we first visit and wanted to make sure they didn't activate on the way out of the machine. Also wanted to make sure they were the 'real' credit card size tickets and not just paper, as my kids save all their tickets.
So, I'm ordering 2 adult and the 2 free kids, x 2 orders for my bro & family and us. All on my CC and will pick up a week before we enter park. Told that will work!
HTH