Am now a Snort Supporter 😎 , however this was unclear because I understand subscription is also a term used in the relay connection. Maybe a better way to word it is "relay requires payment, please visit ...".
Discussion
I think the relay is missing "Paid relay" info in its NIP11 as well.
nostr:npub1v0lxxxxutpvrelsksy8cdhgfux9l6a42hsj2qzquu2zk7vc9qnkszrqj49 nostr:npub1r0rs5q2gk0e3dk3nlc7gnu378ec6cnlenqp8a3cjhyzu6f8k5sgs4sq9ac
Not sure if I can set that, I would have to use the built in invoicing