The system we use will allow us to determine exactly who is in the venue by 'checking in'. If for some reason some people with tickets are not in the venue by a set time, we will look at allowing a handful of people in to replace those 'no shows'. I wouldn't rely on this at all however, as we cannot make guarantees for other people's behaviour.
If you'd like to talk to me about volunteering in anyway, please send me a PM.
Even the smallest donations help keep sc2sea running! All donations go towards helping our site run including our monthly server hosting fees and sc2sea sponsored community tournaments we host. Find out more here.