After a lengthy conversation with affiliate researcher Olivia Steiert, I have sketched out five levels of engagement with my project Intertwingler, ordered by investment of time and skills:

Using

You are using an instance of Intertwingler that I am personally✱ running:

Instantiating

You are running an instance of Intertwingler, using a presentation layer I (or potentially somebody else) have already prepared, on one of your own properties:

Adapting
You are an enterprising person with front-end skills, using Intertwingler to make your own dense hypermedia network with your own UI design.
Extending
You are back-end Web developer, comfortable writing microservices, creating one or more handlers (content handler or transform) to extend the capabilities of Intertwingler.
Porting
You are a library and/or framework developer, porting the core Intertwingler engine to your preferred programming language.