Perfect example here. What this is all about? Event experience. Face it, our game day experience is marginal at best. How many threads have we had here about various topic and how bad it really is. From getting in the game, to concessions, to PA, etc, etc.
Really the only things we really have is a great area for tailgate and parking. How many other stadiums in the country have what we have? Not many. Again, we do everything we can to push people people away.
Again to your point about Festival International and Jazz Fest. For me personally, I have had many many chances to go to Jazz Fest (for free). I have skipped out due to conflicts with Festival International and Crawfish Festival. This past year was the 1st time I that I went. It was such a great experience, I could kick myself for not going in the past. Plan on going back this coming year and many years to come. Its all because of the event experience. That is why these types of events are popular.