author here! I built it selfishly because each time someone comes to my house to do work (cut grass, clean, barber, handy man, etc..) I am always asking the question - "what payment app can I pay you with?" If they have a paylinkz URL I can simply just pick whatever is convenient for me and pay them via it.

I'd also mention that since launching the app, I have see the users span from basketball coaches, non-profits to side hustlers.

You might want to read my full reasoning here https://paylinkz.app/about