What does it matter if it sells out months ago or within minutes of kick off? If it sells out, that is all that matter.
When I worked in the world of events, the old saying was any event that sold out early was underpriced and money was left on the table (same if inventory was left on the table, generally it was because the prices were too high).
Arguably it is more nuanced than that, but it seems like a pedantic thing to be 'disappointed' that they haven't sold more yet when they are still on track for a sell out, and when this game will rival the Brisbane Derby as the Dolphins most profitable game of the year.