Where's this Fury got a bigger audience than Haye come from?

Both fights took place in 50,000 seat stadiums, as have lots of Wlad fights over the years.

There were reports that Haye-Wlad did a million Sky PPV buys, Fury-Wlad did 400k (less than AJ-Whyte). Haye-Wlad got the highest ever audience on German TV for boxing (16 million). Both fights got over a million viewers in America on HBO.