Do the dedicated, die-hard and fanatic huy chương also depens on the number of people who see what bạn post?

Yes and no.
In your case, no one sees it and so then no one sự bỏ phiếu on it.
In order to get a medal in a club bạn have to have alot of people like your pictures.
hoặc bạn have to have a lot of people answer your câu hỏi kiểm tra questions.
hoặc both.
So yeah if there are only 2 people I don't think bạn can get the medal.