I am not really sure, why this takes half a thread page to understand.
His example was 500 bounty.
This kill would result in the following archievements for the one who kills the person with the 500 bounty named dennis in his example:
noublipasa happens to have the luck and kills dennis
He would get an increase of +4 within his bounty
He would get +500*0.75=375 experience
He would get +500*1.5=750 ingame cash
He would get his kills increased by +1
In the hope it is
dau secured.