Anyone can setup nostr:nprofile1qyt8wumn8ghj7un9d3shjtnrda5kummn9e5k7tcqyzagpxgxvmhskm6t55zex3a7kyey9ys723nfu6qqvn9825jk5836v8xsdxk just by signing up. It's just a web page / app.
They can generate an invoice with it and send it in e-mail on the same interface for payment, etc. It's really easy and it's free. Check it out. I was seriously impressed with how simple they packed it together.
No brainer. 😁