The details are hidden at the bottom, most of the repositories spatie has on github have a postcardware statement in the readme, similar to this. Postcardw

The details are hidden at the bottom, most of the repositories spatie has on github have a postcardware statement in the readme, similar to this. Postcardware You're free to use this package, but if it makes it to your production environment we highly appreciate you sending us a postcard from your hometown, mentioning which of our package(s) you are using. Our address is: Spatie, Samberstraat 69D, 2060 Antwerp, Belgium. We publish all received postcards on our company website. It's cute, they don't demand anything causing licensing issues while having some fun with the postcard thing. Kind of reminds me of SDF's option to verify your account with a postcard instead of a small donation.