RUSH rewards are gifted to users who have connected certain game accounts to the Player Rush site.
To gain RUSH rewards by playing PUBG you must first connect your account to the Player Rush site. To see how to do that please check out our article on Connecting PUBG to Player Rush
Once you have connected your account you can visit your Player Rush PUBG Dashboard.
There you will see your stats and rewards for PUBG, as well as the Player Rush PUBG Leaderboard. Player Rush members gain RUSH rewards for killing opponents inside of PUBG Battle Royale games.