Bounties can be exploited by player by doing the following:

1. kill player with bounty
2. bounty is removed
3. player logout and login back
4. player now have the original bounty back in place
5. friend kill player with bounty
6. repeat

so they can become rich quickly by exploiting this.

Please test this snapshot

https://fractal.lindegaard.one:8181/job/MobHunting/892/

and please let me know if it works?

Released

Tried 6.8.4 , seems like it can still be exploited. same steps, user killed by friend, user logout, login, and bounty reappears, killed again, logout, repeat. I'm using mysql for mobhunt, not sure if this is relevant or not.