iMob has been updated, with bug fixes for negative energy, and the fighting system has also been revised. You cant fight members of your mob, and you can only fight within your level. The server is apparently being updated as well, which is good news, as it was constantly raped by the hordes of people abusing the system.
The new update has actually made my bank balance go from positive to negative. I had a healthy balance (managed to kill some marked people for hundreds of millions). Also, I got a message saying I'd receive a free machete however I don't have one in my weapons or profile. EDIT: Never mind - it is now showing up in my weapons list.