Why would people who have tickets sell them if there's a DVD release, especially when this could be(?) the last time they play that part of the world.
My point was not that it would affect the JT19 ticket sales (they're poor anyway), more like the band will be busy with the tour and they won't be working on/promoting the release as they'd normally do.
But then again @deanallison has a very valid point pointing out that Boston 01, Chicago 05 and Pasadena 09 were released while their respective tours were still on. So my point makes no sense whatsoever