I had a look at the code from the experimental relays yesterday. This can be done quite easily, as long as clients provide a view for seeing only the comments published to a given relay.
I agree with you on the voting threshold; I’d need to think more about that one.
I also completely get your point about the nature of curation, with "seed" curators having their "shares" diluted over time. That’s one of the best ideas fiatjaf has had recently.
Still, curated relays with only a few seeds like this one are great for onboarding and demos, especially before the “shares” dilute too much. I think this area could be explored further (I mean, by the Nostr coding geekies out there, apologies if it sounds like I’m volunteering you for work here 🤣, I’m just genuinely excited about the potential for curated relays and SpartiaNostra is a great showcase for it).