당신 just have to add content to the club: images, videos, 기사 and the like. If they're good quality stuff, people will 팬 it and eventually you'll get a medal. It takes a while though, so 당신 have to be patient.
I got a green one for the 디즈니 Princess club. idk how i got it at all! The one day, i had no metals, and then the 다음 time i went on this site, BOOM! it was there!