Check "Use player bounties" on the Game tab. Enter the bounty chip cost in the "Bounty chip cost" field. Check the "Restrict bounties" field if your players aren't required to purchase a bounty chip, and you only want players who have purchased a bounty chip to be able to collect a bounty chip from other players whom they bust out of the tournament. For any player who does not purchase a bounty chip, simply set the "Bounty amount" to zero in the buy-in dialog.
To award points, use the "nb" and "nbk" variables. Try "(nb+nbk)*2". This would give 2 points for each bounty chip they collect, including their own (if they win the tournament and keep their own bounty chip).
If I read your post correctly, it sounds like everyone automatically gets a bounty chip, but you don't pay any additional amount for the chip, and you don't get any "money" for winning the chips, only points. In this case, I wouldn't even use the bounty chip feature, since it requires an amount paid to get a bounty chip, and awards the amount paid to the collector of the chip.
In this case, you should just use the "nh" variable. "nh*2" gives two points for every hit a play makes, and since every player has a bounty chip, this would equate to each bounty chip each player collected. To award the winner of the tournament their own bounty chip, you could add two points to the first place prize.
I believe you could also use a formula like this: "(nh*2) + ((r==1)*2)". r being the rank, if the player's rank is 1, then (r==1) equates to true, which will be coerced into "1", and when r is not 1, (r==1) equates to false, which will be coerced into "0". This would give 2 additional points to anyone ranked "1".
OK, I just tried the very last item, with (r==1), and it does not work. However, a small change will fix this. So, to award the 2 points for the winner, you'll need to use a first place prize. I'm making this change now, so this will work for the next version.