Me since Fiatjaf told to a public (or twitter?) about Branle a couple years ago or so, conceded it'd be a biased approach aside the normie one you prolly are asking for in so which case I wouldn't be hesitant bet there will be cases of people stumbling for themselves into nostr 
https://image.nostr.build/01e17e055aab000b757268adf6724905c95f0250dda28fed1051520711894a0d.jpg