I don't know. I can give you some numbers though.
At National i got over 2Million PPV revenue for 1 Event from America1-Select.
At Global did an Event(48,34 TV rating, over 36 Million Viewers) on my own Subscription Network(Enormous worldwide).
I got just over 400k in TV-Revenue for that.
One TV-Episode then got me 900k in TV-Revenue on my Network.
So my Conclusion so far is that Subscription and Commercial are ok for TV, but they suck for Events unless i am missing something.
Edit More Numbers:
At Global one Event on my Enormous-PPV-Network: over 22Million PPV-Revenue, Buyrate 25,36
At Global one TV-Episode on the same PPV-Network: over 4 Million PPV-Revenue, Buyrate 4.60
So everything on Subscription brings in about 1,3Million, everything on PPV gets me over 26 Million.
Even with 4 non PPV-Events per Month instead of one PPV-Event per Month one would not come close to the PPV-Money.The bigger Pop Gains would have to be huge to justify anything other than PPV imho.
One Idea could be to set up your own Subscription Network to make money only of your Global-Size without broadcasting any TV-Shows or Events on it. Your shows could make the real money on other Networks then.
But for my global Promotion the profit from that was less then 200k, so for me its not worth bothering with.