LOL
I think this was discussed when i first joined the server. The admins had made it so that there was a small chance (Like 5%) that if you kill someone you get a bit of there money.
Lawlno, you came before me and I even know what they did, they had a plugin that made it so when trainers killed each other it caused the other person to give money to the other.
But they were stupid enough to not realize that it only worked for OPs, so whenever they were told it didn't work, they'd test it on each other and there would be no problem.