wtf is going on over there
Odds are that Reddit noticed that the overall quality and diversity of its content decreased, since almost nobody with a functional brain contributes with it nowadays. That's what I believe to be the reason for the AI porn carveout - to explicitly tell people "hey, it's fine to post AI porn here~ please post it~ as long as it doesn't depict real humans, it's fine~".
I think that it'll backfire; SFW AI pics are often crap and extremely generic, and odds are that the porn AI pics are the same. They'll just further bury the content that people actually want to see.
What I'm interested the most is however on the side note of the article:
Speaking of Rule 4, it got an adjustment today as well: “Do not share content depicting or promoting neglect, physical, or emotional abuse against minors.” Minor abuse is a brand-new category of depiction that Reddit doesn’t tolerate.
Rules in Reddit are almost never enforced for their own sake. There's only Rule Zero ("don't prevent our profit"), everything else is just an excuse for that that may or may not be enforced depending on Reddit Inc.'s goals. It gets worse because those rules are often evoked in situations that have jack shit to do with them; like, a poster says "Alice told Bob to kill himself" and the poster gets banned for encouraging harm. (Yup, it's that dumb.)
So this carveout makes me ask, which demographic is Reddit trying to get rid of, and how do they conflict with Reddit Inc.'s profit? I have no idea.