My main takeaway is that it is using it's own database of events(currently indexed: 812.09M events · Nov 6, 2020 – Jan 13, 2026), and continually gathering from other relays, which it obtains from users kind 10002 events.

I also noticed the mutiny wallet relay is in the top 50. I swear it's been two years since that closed shop. Could be unaware users, and likely some of the group who have left. No need to update your relays if you're not using Nostr anymore.