Yea, for anything like this to work, you would need to have to show your cashier, prove that you're not redepositing, show your results that you played within your means, then also profit. Have fun figuring all of that out. Also, it will be pretty hard to determine a winner as far as how they manage their
bankroll. Technically, you could play and follow a BRM system perfectly, but still lose half of your roll if you suck at poker or have a bad streak, whereas someone who is terrible at BRM could sit down with their whole stack and triple their roll in one sitting. So if those two people are there, who is the winner in your case? Also, it seems like you're applying this more towards tourneys, but what if you're playing Ring? Also like Stu said, ROI has nothing to do with BRM