One of them reminds me of the nostr:npub1wxl6njlcgygduct7jkgzrvyvd9fylj4pqvll6p32h59wyetm5fxqjchcan logo. 

I still feel like this idea never got a fair shake. 😞
nostr:note1lvt7mgfp3sr877spe0pl8jjgzuj9yhlyee7s6p3w65zxtgzdgjdspvcpah