I hangout on hackernews and think I remember "reading" all 3 of GPT-3 articles. I used a screen reader, it makes it fast for me to "read" while I do other things. I generally enjoy the content hackernews links to and often read it before I evaluate the source, because really I'm just looking for something to listen to while I make my tea or something. I noted that they didn't seem to reference anything and decided I would try not to heed the advice they contained.
I did think it was a human. I just thought it was low quality selfhelp stuff that you see out there. The "...too productive" one was more convincing because it felt like more of a personal story that didn't need to have references.