There were about 5 or 6 people in the cancellation line at 745 last night. At 8pm I still saw few vacant seats. They didn't start the show until 8:10 because I think they were making sure all the vacant seats were taken or were waiting for the late ticketholders. Wasn't able to track how many eventually got in. Near my seat they sent one from the cancellation line around 8:07 but unfortunately the original ticketholder came in around 8:08.
I saw it last week. The cancellation line started forming mid-afternoon, but about 5 people got in, including the woman who ended up in the seat next to mine. So there's always a chance.
At this point you can pretty much give up that someone is going to give up their ticket for this. It became a must see show and it's obviously very limited, so I think maybe just hope they put it on somewhere in the future.