Here are two popular examples of membership subscriptions:

• ETIQL 
  World's first community driven direct-to-consumer-club transforming the industry of consumerism by offering its members high quality products. 
  
  In the last year, there has been over 1.1€ million in ETIQL membership savings!

  Store link

• Digital Content Subscription
  After you become a paid subscriber, you get access to all the digital content that can be accessed via login details.
  

Links take you to the actual store.