The perfect formula leading to the Dan event were existing precursors (a-la nostr:npub1dergggklka99wwrs92yz8wdjs952h2ux2ha2ed598ngwu9w7a6fsh9xzpc and actually lots of Dans IRL), and the right present elements (a-la nostr:npub1r0rs5q2gk0e3dk3nlc7gnu378ec6cnlenqp8a3cjhyzu6f8k5sgs4sq9ac, nostr:npub1sg6plzptd64u62a878hep2kev88swjh3tw00gjsfl8f237lmu63q0uf63m and others changing their handles, combined with meme reposts taking off), and a general good vibe that week, seems to have been the cause IMO.
The UTXO handle swap almost took off 😅