there are no ppv bonuses or buys to share as far as I am concerned. Unless he has a great agent, Roman's salary is his salary, pretty sure that's how WWE has worked for a while now
As I understand it they have a base salary. Which guarantees amount of dates, what they're paid if they're injured things of that nature. It's possible this is just legends deals, or the old way.
The dates portion may require x number of PPVs for main eventers to show up at? So if your contract says 10 but you do 12 you may get a bonus or incentivized in some way.
I mean if I'm WWE and I've got Roman under contract and it's a blanket contract for whatever I want to put him on I'd use him a bit more than I am now. I get keeping him off air is safer for him draws out the title reign. But does Roman actually move the needle so much you need that?