Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
What does this mean? I never rated teams with a goal other than to make others better at the game and to try to let them have more fun. Thank you for the compliment, though. I appreciate it and will look into it if I remember! :)
I'm no expert, but at the minimum you'll be tracked for your rates, and that way you'll be recognised more, as well as having a chance to get rate of the week if you're an official rater
The rewards are a different role color and the ever-desired reacts! After a minimum threshold of rates, your time spent as a competitive helper/team rater will be used in determining the Live Chat Contributor badge award or the Team Rater badge award!