CONTRIBUTOR
contributor
(noun) a writer whose work is published in a newspaper or magazine or as part of a book
subscriber, contributor
(noun) someone who contributes (or promises to contribute) a sum of money
Source: WordNet® 3.1
Etymology
Noun
contributor (plural contributors)
A benefactor; someone who donates to charity or some cause.
A person who backs, supports or champions a cause, activity or institution.
A person (or thing) instrumental in the creation or growth of something.
A person who produces articles published in a newspaper, magazine, online publication, etc.
Source: Wiktionary
Con*trib"u*tor, n.
Definition: One who, or that which, contributes; specifically, one who
writes articles for a newspaper or magazine.
Source: Webster’s Unabridged Dictionary 1913 Edition