It’s on the website Morris very clearly - https://www.oldhamathletic.co.uk/club/visitors-guide/
We are in league 2, how many others are you expecting turning up when the team aren’t at home to collect tickets when it is easy booking tickets online. Stupidity.
I use my ST to buy for myself and my mates for away games never had an issue. Times are changing, you only have to look at most high streets to see that. Amazon and the likes online taking over.