Go to this page. http://www.insidesimracing.tv/main
Register an account and vote in the pool/survey on the bottom of the page. Maybe Inside sim racing will test the new beta and tell a bit more about it in new episode of their YT program.
The reason why they know about KRP now is because Mitdawg48 posted on their forums (linking one of his videos of KRP) and then they replied and they were very interested. :)
Hell, It's about time! For now KRP is only existing simulation concentrated on karts. So it's quite weird that they didn't review it yet (i assume game is still to small for them to notice it).
One problem... in this pool i would choose Assetto Corsa :P . But still it's good idea to get them onboard.
I think its not a bad thing to cheat a bit and motivate group of KRP fans to put it on top of the list. I think there is enough of us :) I'm not saying that they wont notice sudden increase in "votes" for KRP, BUT WHO CARES :) GO THERE AND VOTE !!!!