What if the bounty was chosen randomly? Like every 15 minutes or so there's a bounty that's based on how many people the player has killed in that time. So if I killed 5 people, the next bounty happens to be me (it's by chance), then there would be a 500 Meeble bounty on me (1 kill = 100 meebles for bounty purposes). I think that would fix this issue of a player choosing it and it would be kind of fun.
And so we aren't adding money to the eco it could be a choice to participate in the bounty or not. Like /bounty go to join the next one, and that would take X amount of meebles from your account (so that it adds up to the bounty amount).
Is that too confusing? Too different? I just think having the players choose the bounty could be easily abused. Like if you know someone is bad, put a 1mil bounty on them, you just made a super easy 1mil from no where. Maybe just having the same system as /warp pvp does is the best option?