Basically, দ্বারা being an active member of a club and contributing things which others like: 1. Getting the links, articles, প্রতিমূর্তি and চলচ্ছবি you've added fanned 2. Answering lots of questions, মতামত etc. 3. It's easier to get পদক in আরো active সংগঠন than dormant ones.
I don't think there's a set number of অনুরাগী অথবা contributions. The system's pretty random. Sometimes it doesn't really make sense.
