Huh? Sites like the BBC don't see guards, or middle relays, just exit relays. However, Tor relays are exits only if their torrc has this: ExitRelay 1 Oth

Huh? Sites like the BBC don't see guards, or middle relays, just exit relays. However, Tor relays are exits only if their torrc has this: ExitRelay 1 Otherwise, to start, they're just middle relays. It takes a while to earn the guard flag. But eventually, some relays could fill all three roles: guard, middle, and exit. As far as I know, bridges are the only Tor relays that can be unpublished.