That's depressing that anyone would get 600k pks. I had about 9000 kills on PC Classic in 5691 hours, and 3200 kills in 322 hours on iClassic. Actually, it's really weird that I have such a high number of kills on iClassic.
Most good pkers will get 10k within 50 hrs of playtime
I could see maybe adding a separate type of currency earned from pking or sparring, and a pk/spar shop where you can buy some dumb item or hats or something, to give a bit of incentive, but gralats? nah