Pretty much nothing I produce outside of work makes money, because they're all foundational tools.

For example, the Dogma metalanguage: https://dogma-lang.org/

Or Concise Encoding: https://concise-encoding.org/

Or KSCrash: https://github.com/kstenerud/kscrash

Salary overlap calculator: https://news.ycombinator.com/item?id=36109848

Letters to a new developer book and blog: https://letterstoanewdeveloper.com/the-book/

I created a custom GPT for Black friday deals. Here you can check- https://chat.openai.com/g/g-aMhMtTRCj-top-black-friday-cyber...

Am I correct in assuming all the comments misunderstood the question? I thought it was asking "should you share...?", but the other comments seem to be taking it as "share something".

I think you should always make everything public.