Klischko fights are free to watch in most countries. And in the US you just needed a Epix subscription. So no, not many people actually paid for it. US PPV sucks anyway...
Aside from the Vitali/Kirk Johnson debacle, when have the Klitschkos ever been on PPV in any country?
The Haye "fight" was PPV in the UK, and the Adamek "fight" in Poland (probably). And (sane) people knew what they tuned in for with the Wlad vs JMM "bout".