Thank you, ccbroadway13!
To add my 2 cents regarding the DEH lottery and cancellation line....after entering the digital lottery almost daily since the beginning of the year and never winning, I decided to try the cancellation line last Saturday, 4/15. I was going to see the 3pm matinee of Paramour anyway, so got to the Music Box Theater a little before 2pm, right before the matinee for DEH that day. Because the show was about to start, the box office was closed to future sales and open only to people picking up tickets for the matinee. I was told to come back at 2:15pm if I wanted to purchase tickets for a future performance. I wandered across the street to see if there were any rush tickets available for Come From Away, but they also had a 2pm matinee performance and have the same policy about futures sales right before a show; I was told to wait with 2 or 3 other people who had formed a line already. I decided to go back over to DEH, and was about the 3rd or 4th person in line there. At almost exactly 2:15pm, they started letting us in one by one to purchase tickets. When I went in, I inquired about rush and SRO tickets. I was told that there were no rush tickets for DEH (I didn't think there were, but thought I'd ask anyway!), and that all the SRO tickets for the evening performance were already sold. Then I inquired about cancellation tickets for the evening show and was told that they aren't released until about 2 hours before the performance. So I went to Paramour and after the show ended, went right back to DEH at around 5:30pm. There was one woman standing outside the theater, but I wasn't sure if she was in a line or not, so I proceeded into the box office and asked about rush/SRO (just in case!) and cancellations again. Again, was told that SRO tickets were all sold and that they start releasing cancellation tickets around 6pm. The box office person told me there was already a line outside, so I went back out and fortunately, there was only still the one woman standing there. I asked if she was in the cancellation line and got a yes. After about 10-15 mins, I believe around 5 more people joined the line. No more joined by 6pm. Right after 6pm, a man comes out and goes directly to the front of the line and asks the lady how many tickets she needs. After she said one, he said he had a ticket for her that was $189 and to go into the box office. Then he asked me and I also replied one, and he gave me the same response, and told me to go into the box office. The woman in front of me got Orch L Row F Seat 1 and I got Orch L Row F Seat 3. Only 2 more people behind me also got tickets I believe, and they sat next to me. These were excellent seats; believe that they were house seats that were unclaimed by friends/family of the cast and crew. Definitely a great deal because seats a row or two further back from these and also further to the sides are listed as Premium on Telecharge and go for $399!