Why can't I deduct the player pack cost/value from my Pro purse like I can from the Amateur purse?

You may only deduct player pack cost/value from Amateur divisions as the total Amateur purse is made up of both player packs value and the value of prizes awarded based on place of finish.  The Pro purse is ONLY comprised of the cash awarded based on place of finish. If you wish to provide a player pack to Pros you may do so, but you need to pay for it in a way other than removing that value from the Pro cash purse.