Sure.
For starters, let me say that it's a very small percentage of the activity, certainly in the concert world, where that happens. It does happen, but it's almost always at the direction of the artist—as part of your question there. Just about everything we do, especially from a ticketing standpoint and from a marketing standpoint, involves artist approval. We send all of this back to the artist to review and update.
In terms of that practice of holding back tickets with an interest in understanding that what's going on with the marketplace is responding accordingly, it's a very small percentage that do that. Far more often than not it's either artist-directed or coming from somewhere within the artist world.