Ok, I know all coins are scam, just a opportunity to make money, live happy and so on.
But something to me is not right.
How can someone have like over 2000kh?

I have 6gpus and just around 20kh.

That's insane what are others using 500+ gpus or is something wrong with me??
I think something is wrong with your settings.
one 270x gives me over 2mhash/sec. that's 2000khash.
I run over 50mhash on x11, and it takes ~ 40 video cards.