tu have to post más than 20 pictures probably. Or, post más than 20 articles, videos, polls, questions... etc. I got my dedicated medal for the Total Drama Revenge of the Island club por adding quite a few artículos (fan fictions), polls, images, preguntas and going there everyday. I got a Die-Hard Medal because, I've been on the TDI spot for almost two years.
Its easy tu should just subir pictures and videos if people be fan of them tu can earn medal más picture and más fans,Higher Medal! from my experience fan arts are the best to subir Cuz People like them más than others i guess! And subir pics tu know People will be a fan of!! be Active Thats all!
I just got a medal in a club I have publicado no más than 10 pictures, few people fanned them, like 4 each, and I have answered questions, picks, also made some, and that's all... Also I made the banner but fanpop couldn't know that...Anyway I don't think this would work in a club like misceláneo o música o movies, I think it also depends on the club's popularity and general activity :/
tu get a medal por posting pics and other stuff,its not necessary only post pics...you can make picks,quiz,add enlaces and artículos etc... and if people like it...then tu have más chances to get a medal,so before tu add something...make sure its something cool and people will like it :)
and that's how I got all my 13 medals,good luck ;)
I don't know a specific number... tu have to post a bit of everything but tu can't get a medal just por posting stuff: users need to see what tu post.
For example, I publicado a lot of stuff in a club that has only a few fans and I didn't get a medal yet because not so any fans have seen the stuff I've posted.
If tu want a medal for a club that has a good amount of fans, then don't worry, it won't be a problem, tu just have to keep being active in the club.
Here's how I got my medals:
Twilight Series: publicado a few picks, answered many picks and publicado around 20 pictures. As tu can see, it's not a lot but I got my medal and it even upgraded to a Die-Hard fan medal even though I didn't go there anymore.
kakashi Spot: publicado A LOT of pictures, answered 1-2 picks and that's it. I didn't go often on that club.
True Blood: publicado around 30-50 pictures, created a few picks, answered all the picks.
Lie to Me: Answered all the picks, created a few picks, publicado a few pictures and a few videos.
misceláneo spot: publicado a few picks, answered a few picks, publicado like 5 videos, 2-3 pictures and answered A LOT of questions.
Yeah sorry for the long text, looks like I was inspired ^^"