nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqvzl4lzt0kye9xycau3qpy69zqq6zdn2n0y92glxxfqg2dy4n2mjssuc2kf It's a method of link-attribution that works in Google Analytics, PostHog, Fathom Analytics, and more. For example (normally lowercase, but I put the variables in uppercase for clarity)...