With my Kagi shirt, I've been asked a couple of times about Kagi. Include some business card style "Kagi-Cards" that have a QR code on them that gives you X free searches on Kagi. One very important aspect of this is that the QR code workflow should be "scan -> open Kagi -> search" with no sign-up or other interruptions.
Sorry to put this under search quality, I had no idea where else to post this!
QR code workflow should be "scan -> open Kagi -> search" with no sign-up or other interruptions.