I was there but left a bit early. Can't really walk the ramps and I didn't want to stand around for an elevator for an hour after the game.
$$ is the answer to your question. But still, it's terrible scheduling. More students there than I thought there'd be though. And a lot of regular fans are absent too. Just a wild guess, but I'd say 40-45K real numbers.
I wonder if the OM game will be the same, given that it's on a National Holiday, second only to Christmas in popularity of family gatherings.