Yes, I do understand that folly regarding money. Money tends to bend reality, there are many psychological experiments done with money,
for instance: spending physical money induces more pain than spending money using a card, that's why it is recommended to carry cash around the next time we do shopping (read this in a book Thinking Fast and Slow and observed in real life)
I know you aren't trying to remove that pleasure from my life! But the thing is, after open sourcing my tutorial, it has been read thousands of times, and there have been 4-5 readers who went out of their way and communicated to me how much they loved the book and in the words of one reader on HN, "it is one of the best tutorials I have read" regarding webapps in Go.
It is a humbling experience for me to hear this from someone else (who isn't my best friend :D)
It is a great irony that while documentation is free, books are not.
Plus, I am not an author, writing tutorials/books isn't my primary source of income, although I was thinking of keeping the Vue book/tutorial open source on github, it already is, http://github.com/thewhitetulip/intro-to-vuejs/ and charging money for the PDF, most probably I won't be doing that, let's see.
Thanks for your input!