Yes, the #Alexandria client has the paid wss://theforest.nostr1.com (social) and the free wss://thecitadel.nostr1.com (publication/documentation) relays.

The #GitRepublic project, which includes the upcoming publicly-viewable git server, also includes the private, paid wss://gitcitadel.nostr1.com relay.

Each of the three relays are just the first of a set of relays, run by different professional operators, on different continents. Our income is currently over Geyserfund, zaps, and the paid relays. You pay us and we pay the relay operators.

We also self-host an instance of the #Realy relay, now, which is important to us for some of the features (RESTful API), and to have a non-strfry backup. We're debating adding that as publicly-readable, to our overall user landscape, as it would help with the #epaper implementation and add more redundancy.