I am not a big fan of clashes, but I know a lot of people love them. These are the folks that buy CC passes to play in them. Those people would play the same amount during a clash, regardless of frequency. Others, like me, would just play a few each clash like we always do, regardless of frequency. The ones that don't play now would be unlikely to play with a lower frequency.
We are just trying to draw logical conclusions, and I agree with Robert that the net revenue would likely go down noticeably. If WGT thought a change to the schedule would increase revenue, I suspect they would have already tried it!!
(LOL - when I saw the title, I immediately agreed with it, but for a different reason!)