Hi, I have a forum with 830 k visits per month 80k members 936 active users about health and medical issue 96% of visitors are local its progress is 60% per year . I am thinking about using Premium Memberships for earning money . do you think is it useful? one sample http://www.webhostingtalk.com/memberships/premium/
this site also have some important information,like disease, contact with good doctor in emergency case, etc.
Yeah, you need to offer products or features to your users on the forum so they know Premium Membership is worth buying.