Like improv says, it votes any version of 20, including 20.12. So as people upgrade it will continue to vote the 20.12s and not the 21.0s. I don't think voting the 20.10s makes any real difference except as a point when they upgrade to 21 and lose the vote.
It's not like we're at any real risk of getting anyone other than Drakos into the top 20 anwyay.