So the tournament lasts approximately 130-140 days. Started in February.
For your argument to be valid (as I read into it), a new release could not be used in the tournament once the first ball is rolled for score (back on February 20). Everyone who bowled that first week, first month, so on, didn't have access to the equipment that has been released since.
I find it hard to believe that someone is sitting at home right now, reading this thread and thinking, "If only I had the (insert brand and ball) in my hands when I bowled the Open. Not having that cost me a shot at an eagle. That's not fair."
BTW, Brett Wolfe finished up a 2,245 all-events total today using a Blue Hammer.
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"Chicks dig the trip 4" -Randy Pederson