Then-Amazon Web Services CEO Adam Selipsky gestures toward Anthropic CEO Dario Amodei during a conference. Noah Berger/Getty Images for Amazon Web Services Amazon's stake in Anthropic is paying off big time. Amazon said most of its other non-operating pre-tax income was due to its Anthropic holdings. Amazon has previously invested $13 billion in Anthropic. Amazon's stake in Anthropic is proving to be a massive boon to the world's largest online retailer. In its latest quarterly earnings rep...