http://www.drf.com/news/article/107613.html
I'm no Scav, but I read this as attendance being up 400% and handle only going up 250%.
It makes sense. The hardcore gamblers are going to wager no matter what time of day. The extra people that came to the track for the night cards are not the hardcore gamblers so they don't push the same amount through the windows as the people that are normally gambling on the daytime Friday cards.
CDI figures, if they don't want to gamble, we'll get them for a sawbuck as they come through the turnstyle.
It's still waaay cheaper than other friday night entertainment alternatives.