I don't know how the PPV figures looked like in the past. Does Wrestlemania draw that many more viewers than the Survivor Series or Royal Rumble? Growing up, those two were always the must watch ones for me on PPV. I'd rent Wrestlemania when I was a kid if I didn't have another friend already getting it on PPV at their place.
Those anecdotes of mine mean nothing, just wondering. Some wrestlemanias were definitely must watches depending on the card, but I always loved the gimmick of survivor series and Royal Rumble.
Wrestlemania does tons more domestic buys like 800k vs Summerslam, Rumble, Survivor Series are lucky if they break 300k.