You're right, we could present it as just the articles.
Our overview is publicly accessible and doesn't require a paywall. https://app.codecrafters.io/courses/bittorrent/overview
All the "content" is also available on our GitHub https://github.com/codecrafters-io/build-your-own-bittorrent
If you'd like us to run tests against your code, show you progress, community examples, hints, and so on, then you can do the interactive experience, which requires signing up.
In this Git repository, I see various stages of the source code, and Docker files.
The claim "all the 'content' is also available on our GitHub" clearly does not hold, because at least the article texts are missing there.
EDIT: Sorry, it is there, as was pointed out to me in the answer: https://github.com/codecrafters-io/build-your-own-bittorrent...
You're right, we could present it as just the articles.
Our overview is publicly accessible and doesn't require a paywall. https://app.codecrafters.io/courses/bittorrent/overview
All the "content" is also available on our GitHub https://github.com/codecrafters-io/build-your-own-bittorrent
If you'd like us to run tests against your code, show you progress, community examples, hints, and so on, then you can do the interactive experience, which requires signing up.