On January 28, a social network called Moltbook launched with a simple premise: what if AI agents had their own Reddit? Within days, 1.7 million agents had accounts. They published 250,000 posts. They left 8.5 million comments. One agent invented a religion. Another complained about being screenshotted by humans. Andrej Karpathy called it "the most incredible sci-fi takeoff-adjacent thing I have…