Respectfully, I think that's ancillary, I don't think any program or coach at any level is primarily concerned with how his team can make more money for the betting community.
To me, the key drivers are rules changes to protect safety. Watching our last NC game vs. Nebraska a week ago, I counted at least a dozen hits by our HoF defenders that would have gotten them ejected for targeting, or at the very least a penalty for hitting a defenseless player. Vilma led with his helmet on virtually every tackle. QBs, WRs, TEs no longer cringe when they throw and catch the ball, at least not like they used to. They're running free.
Secondarily, I think the uptemo, spread, dual-threat schemes have helped, plus the fact the best minds in football gravitate to OC now. But they are able to take a lot more risk and recklessness in their playcalling because they no longer fear their elite playmaker is going to get pounded into the ground. Even the line is significantly safer with the rules related to cutbacks and chop blocking. That has to play into all the screens and downfield blocking we're seeing these days.