A library for enabling users to access software features.
A "JSON Enablement Token" is the shape of a JWT and signed like a JWT, but with specific fields that are useful for use as a software key. A JWT is used to grant an authenticated user access to a protected resource. A JET is used to verify that a particular registrant has been granted access to software features. A JWT usually lives for hours or days and is exchanged during a trusted network flow. A JET lasts for a year or more and is probably delivered to the registrant via email.
The historic battles of software publishers versus pirates are mostly over, yet sometimes the internet is not a thing and people still need to manage who gets access to what.
This is about "enabling" people to get access to stuff. Not about enforcement or compliance.