We use them in our cash game as a bonus. We all put $10 in kitty before game starts (we actually make it optional not to force anyone who doesn’t want to spend the extra $10, but everyone does). We set a pre-determined time or if game gets down to 3 players, to collect the bonus. As the game goes on and the high hand changes, we move the high hand button to the player with the highest hand currently. When the predetermined time comes, the holder of the button cashes it in for the bonus. We do play the high hand has to make it to a showdown. If you bet with high hand and everyone folds, the hand doesn’t count towards high hand. So, there is some strategy to it.