Is this BitTorrent course free (as beer)?
I can see a neighbour course about HTTP server "free during beta".
You are expected to complete the project in steps they define (so for their Redis project, step 1 is to bind to a port, step 2 is to respond to a PING command, etc). If you choose not to pay, you can only complete one step per day, even if you submit code which would pass future steps.
This can be quite frustrating, since each step is often very simple, and IMO discourages producing a well-architected solution which anticipates future requirements, as you're left waiting 24 hours to press the submit button for code you've already written.
Still: It's free, and the restricted progress forced me to not use it for procrastination purposes, so there's that.
Started the build-your-own-git tutorial and there is a hard paywall after the 3rd stage.
There is a "Subscribe" button which takes you to https://app.codecrafters.io/pay but I wasn't savvy enough to notice it or realize what it was.
Only after starting a course did I begin to suspect that I needed to subscribe since there were a bunch of locks all over. However, it was not clear that the locks actually did anything since I could still click on those links. I guess I would have found out after completing the first step and not being able to progress. This appears to be by design, which strikes me as slightly dishonest.
I've prioritised it now tho