What does "charter subscriber" mean in this sentence? (It's from the movie "Gone Girl" by David Fincher) [closed]

"I happen to be a charter subscriber to middling warlord weekly." (He was guessing what she does for a living and she gave him three ABC options and one of them was that she's a moderately influential warlord :))

A charter subscriber is someone who was an original or early subscriber to a publication, and who (normally) receives acknowledgement and benefits because of that. It derives from the sense of a charter as a document founding something and setting out the rights and duties.

A charter member is a founding member of an organisation, club, society, etc: someone who was in there from the beginning and contributed to getting it started. The phrase "charter subscriber" is similar: it refers to someone who took out an early subscription and has their contribution acknowledged by the publication. Various organisations offer a "charter subscriber" membership level for people who subscribed early with various benefits.

Here are some examples: The Sun magazine looking for charter subscribers to fund it becoming a regular publication. Criterion video has a scheme for long-standing members. If you search for the phrase you will find more.