What is Subscriber ?
Subscriber is (noun) 1. a person who subscribes to a magazine The extra is- sue is sent free to subscribers. a subscriber to a magazine a magazine subscriber 2. a person who pays regularly to use a service Telephone subscribers who don’t pay their bills have their phones cut off. 3. a person who has applied for shares in a new company There were very few subscribers to the re- cent share issue.
source: Easier English, Student Dictionary Upper Intermediate Level