Trusted means has non zero trust rank. Without this filter anyone could drive raw retention number to whatever they like it to be by generating lots of fake accounts.

Also, I would say that absolute retention of 'trusted' users isn't that indicative, but the month-over-month changes to it would be useful, no matter how 'trusted' is defined. Unfortunately, retention hasn't been growing, which to me is puzzling, as if we had no progress whatsoever on UX. Would be great if someone experienced set up a nostr-retention-task-force and dug into this.