How do আপনি get a medal for a club?

I recently got a 'Deticated Fan' medal for the 'Barbie in the 12 Dancing Princesses' club. Before, I thought the same as you. But after receiving the medal, I think it's actually 2 things.
1. Contributions, like আপনি said.
2. How long you've been in that club.

Hope this is right and helps.

The exact formula for gaining a medal isn't known (they don't tell us অথবা otherwise people would be cheating to get a medal). But it's known that আপনি need to contribute to a club. Contributions which get a lot of অনুরাগী and favourites, অথবা even just get মতামত প্রদত্ত on/voted on for polls/answered a lot for ক্যুইজ questions/looked at a lot, help. The system is a bit random. People can get পদক in সংগঠন where they've only added a handful of items, but no medal in সংগঠন where they're a lot আরো active.