When I rate something do I get a chance to get a medal, or only the guy that uploaded what I rated gets that chance??

I think that when you rate someone's stuff then only he has a chance to get a medal for the certain spot. I don't think that you can get a medal by rating someones elses uploads. Only if others rate your additions will you get a chance to have a medal! I'm not 100% sure though... Hope that helped =)

Nobody knows the exact formula for getting medals, because it is secret. Rating may or may not contribute to earning a medal, but I certainly don't think it will hurt your chances of getting a medal!