I think the PPV, VOD model was in lock-step with the growth of the mainstream (and adult) model on home cable TV systems. I think it would have been a case of each learning from the other, though that would be difficult to prove unless we can uncover some inter-office memos and e-mail conversations...
"Johnson, I think you should take a look at the following website...nevermind what I was doing there...yes, the expenditures on the company credit card can be written off as business-related research...now the important thing is the way they handle their billing model...what if we could apply this to family films?..."

I think another billing model that might be interesting is the Steam Network, which has revolutionized online video game sales.