I have several friends with season tickets, but they can't make it over half the time. They mostly have contacts over there to give their tickets to, but sometimes their seats are left empty.The only way Celtic will build up the main stand to have 2 there like the rest of the ground is if the new CL format eventually leads to a European league being formed and Celtic playing in it. The season tickets are sold out just now but every week there are empty seats the club should have a scheme that you can sell on your ticket if you can't make it and the ground would possibly always be full.