They had this linked in their tag so you could click a button in some apps and go here.

I've done that in nostr:npub1w4l9wx8rv529jk0tc3fz0mu2vqc4m7pkjhvv4cvscpl83pmeudnsggrxhw before to donate to the show.

https://btcpay.watchmanprivacy.com/apps/2yKau4k3ox3BT91VxrZzHM5WozpK/pos