alt Hacker News> For example you buy four tickets to go with your friends. But you get sick so you offer your ticket to a different friend instead. Oops that’s not allowed so now no one gets to go?
Or you give your friend's names when buying their tickets so they can go even when you can't or you have them buy their own tickets, or you're sick so you get a refund for your four tickets and your friends each buy their own afterwards.
For many events, the demographics lean toward age groups where people have jobs with work schedules that aren't known more than a few weeks in advance. The initially planned friend group (e.g., four people) can have little overlap with who is actually free on the event date and actually attends. Also, if the event has assigned seating, people buying their own tickets typically has the adverse outcome that you can't sit together.