Curation from our accounts on posts the leaders/community curators have vetted and left in our discord for nomination of curation
This is how @curie used to work (and might well still for the big votes). Some of us have token accounts with the posting key, and if this account is used to vote then the trail follows at a set percentage depending on which token account is used. Saying this, I rarely give out curie's these days, though it is still worth my time if I can be arsed.