This show is dong well because it is Grease. And for tourists it is a sure fire bet on a good Broadway show.
Keep in mind that tourists like to go with things that they know and don't like to step out of the bubble when it comes spending a ton of money on a Broadway ticket. Other then the Disney shows and Wicked and something like Phantom, Grease is a show that a lot of people know and love. So, they will go and see it.
True, that there are people who had bought tickets just to see Max and Laura in it. True that there were people who watched the reality show just for the sake of watching yet another vote in reality show. But, this show will still continue to play after Max and Laura leave because it is Grease. And, like I said tourists go with what they know when they are spending over 100 bucks on a ticket.
"If you try to shag my husband while I am still alive, I will shove the art of motorcycle maintenance up your rancid little Cu**. That's a good dear"
Tom Stoppard's Rock N Roll
