A fan site is a private channel where influencers frequently post content, and fans pay a monthly subscription fee to view your feed. Something similar would be paying a monthly subscription to access an influencer's Snapchat or Instagram. 

You can sell monthly subscriptions to your fansite through your MV Profile as well where you set your monthly cost, and send out regular updates via pics, vids and messages to your subscribers!  

Members will pay a monthly subscription to view your fansite content. It’s like a private club where subscribers have to pay an entrance fee before seeing who is in the club and what is happening inside.