alt Hacker NewsI was under the impression that the astronaut riding the horse was in use prior to Marcus's tweet. Even that substack post has him complaining about how Technology Review is acting as a PR firm for OpenAI. That article shows an astronaut riding a horse. I mean that image was in the announcement blog post[0]
Certainly Marcus's tweets played a role in the popularity of the image, but I'm not convinced this is the single causal root.