The queue system acts as a 'shock absorber' to prevent everybody trying to get their entry in at the same time. If you are entering an event that is likely to have a big initial rush for places then it's highly likely that a queue will be set up for it. However, adding a queue to an online entry system seems to completely throw some people into a panic! What events will have a queue?
Being British, we should all be pretty familiar with the concept of queuing - after all, we seem to spend most of our lives in one these days!
