subscriber

n. one who signs up to receive a service or publication (i.e. magazine, newspaper, etc.)

The subscription business model is a business model that was pioneered by magazines and newspapers, but is now used by many businesses and websites. Rather than selling products individually, a subscription sells periodic (monthly or yearly or seasonal) use or access to a product or service, or, in the case of such non-profit organizations as opera companies or symphony orchestras, it sells tickets to the entire run of five to fifteen scheduled performances for an entire season.
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Noun
1. someone who expresses strong approval
(synonym) endorser, indorser, ratifier
(hypernym) supporter, protagonist, champion, admirer, booster, friend
(derivation) subscribe, support
2. someone who contracts to receive and pay for a certain number of issues of a publication
(synonym) reader
(hypernym) customer, client
(derivation) subscribe, subscribe to, take
3. someone who contributes (or promises to contribute) a sum of money
(synonym) contributor
(hypernym) donor, giver, presenter
(derivation) pledge, subscribe

(n.)
One who subscribes; one who contributes to an undertaking by subscribing.
  

(n.)
One who enters his name for a paper, book, map, or the like.
  

In a public switched telecommunications network, the ultimate user, i.e., customer, of a communications service. Note 1: Subscribers include individuals, activities, organizations, etc. Note 2: Subscribers use end instruments, such as telephones, modems, facsimile machines, computers, and remote terminals, that are connected to a central office. Note 3: Subscribers are usually subject to tariff. Note 4: Subscribers do not include communications systems operating personnel except for their personal terminals.