Why does the HN front page have 3 Stable Diffusion posts?

At 8:20 am BST, the Hacker News front page features three post on stable diffusion. All are by long-lived accounts with decent points. Is it a coincidence? Astroturfing? A glitch in the matrix?

https://news.ycombinator.com/item?id=32655497

https://news.ycombinator.com/item?id=32658408

https://news.ycombinator.com/item?id=32634074