I just went and looked at the top rated SDXL checkpoints on civitai, and that's at the very top of the list and has a similar sort of plastic sheen to it. But after posting that I thought about Stable Cascade, and that both has an even more pronounced sheen like that and similar text adherence to some of the images, but that would be a weird one because it's more complicated to run and not particularly popular.

Someone else suggested it could be dalle, but I don't know anything about the quality or prompt adherence of remote proprietary models so I can't comment on that. The combination of them being strictly SFW and clearly entirely uncurated could point to an aggressively censored corporate model, especially if it was something with a free tier that bots could be querying themselves.