Of course. It means people genuinely interested in your content will have it, but people looking to score cheap Internet points on you won't. ("Did you know he once called chapter 5 of Bob Smith's book 'under-researched," and Bob Smith's grandfather is Puerto Rican, so he's literally saying that people of color are stupid")

If you look at the link, that's what he actually says.

     Sometimes these notes are not things I want to share with the whole world, but might be helpful for a few people.

     So what do I do? I release them, but only for a limited time. I also put on a price tag — not because I expect to make any money, but so that only those genuinely interested will read it.