1. purchase level: free members are usually given by the platform, or they can be obtained through certain conditions, such as inviting friends to register for activities, and intermediate members need to pay.

2. Price: The price of free members is usually zero, and the price of mid-range members is different, depending on the service content of different platforms and different membership levels.

3. Service content: Free members and intermediate members usually enjoy different service content and rights. Exempted members sometimes get some simple privileges, such as priority recommendation and simple discount. And mid-range members usually enjoy more and more comprehensive services, such as higher bonus points, longer retirement strategy and exclusive activities.