RUSH rewards are gifted to users who have connected certain game accounts to the Player Rush site.
To gain RUSH rewards by playing CS:GO you must first connect your account to the Player Rush site. To see how to do that please check out our CS:GO Connection Article
Once you have connected your account you can visit your Player Rush CS:GO Dashboard.
There you will see your stats and earnings for CS:GO, as well as the Player Rush CS:GO Leaderboard. Player Rush members gain RUSH rewards for killing opponents inside of CS:GO matches. The amounts vary depending on the type of match you play, but every kill you make playing CS:GO earns you RUSH rewards.