Same here

It's for the nostr.wine paid relay subscription. Just ignore it if you don't want to use the service.

It's an aggregates relay so the idea is if you pay for it monthly, they'll blast your notes to other relays as well as fetch from other relays. That way you only need the nostr.wine relay in your list (and maybe a few other large ones for redundancy) as opposed to using up your phone battery connecting directly to 30+ other relays