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
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As far as I know, bridges are the only Tor relays that can be unpublished.
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:
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As far as I know, bridges are the only Tor relays that can be unpublished.