Yes, you can! If you are the Group Organiser:
Complete your purchase by paying for your group tickets using Backpocket.
After your purchase is complete, you will receive a group payment link from Backpocket.
Follow the link to pay for one or multiple extra shares. There are no transaction fees!
If you're paying via somebody else's Backpocket link it's even easier. You can instantly choose to pay for one or multiple shares all in the one process 😁