It's quite simple, if you like to gamble, go and gamble your pointless GP away, as it won't affect you in real life, HAVE FUN with it, don't worry about your KDR or GP, the soul purpose of Combat Arms is to have fun, not sell your soul to the game and play only to boost your e-ego to think you're good at something by having a "good" KDR or rank, as those don't decide if you're a good player or not.
Think about it, what clan accepts only due to rank/kdr? Sure, they have requirements, but you'll still be held in a tryout, without passing the trial and meeting the requirements, you won't make the clan. Plain and simple.