rich1.0Mat (npub1lx…dck4m)https://yabu.me/npub1lx349k625y27chfnq4qdmgmmw83yvrxq7e0rxx868vjyj3wu36uqtdck4mnjumphttps://yabu.meSimilar to Nostream, where you can make a relay private and only paying people are allowed to publish messages.