Can there be a relay for a type of simplex sns notification system users can run nostr:nprofile1qqsdv8emcke7k3qqaldwv956tstu40ejg663gdsaayuuujs6pknw7jspzdmhxue69uhhqatjwpkx2urpvuhx2ue0qyt8wumn8ghj7un9d3shjtnwdaehgu3wvfskueq0ncqzq nostr:nprofile1qqsyvrp9u6p0mfur9dfdru3d853tx9mdjuhkphxuxgfwmryja7zsvhqpzpmhxue69uhkummnw3ezumt0d5hsz9mhwden5te0we5hgmmj9ehx7um5wgcjucm0d5hsr097r2 ,something like outbox relays. To take a lot of load off the client?