RUSH rewards are given to users who have connected certain game accounts to the Player Rush site. These rewards are given for a few different actions those players perform in those games.
To gain RUSH rewards by playing Team Fortress 2 you must first connect your Team Fortress 2 account to Player Rush. To see how to do that please check out our article on Connecting Team Fortress 2 and Player Rush.
Once you have connected your account you can visit your Team Fortress 2 Dashboard.
There you will see your stats and rewards for Team Fortress 2, as well as the Player Rush Team Fortress 2 Leaderboard. Player Rush members gain RUSH Rewards for all kills made in Team Fortress 2.