@gunner from past experience of Ayu hall tour, usually the goods will be on sale after lunch time at the lobby inside the venue (they will inform the time in advance). The queue wont be long. And they do accept credit card
The overseas fan tickets can be picked up at the TA booth. Make sure to come abit early as they usually close the lobby before opening it again 1 hour before show. Im not sure how people without ticket can get in if they have not pick up their ticket by that time.