You are correct. The voter has the option to lead options unranked or rank several ones equally. So it's easier than having to come up with a complete ordering. Still, I would expect than many voters would come up with slightly different ballot sheets when having to do it several times. Did I give these 3 or 4 options the same low rank? Even if not required most Debian voters seem to give complete orderings https://www.debian.org/vote/2019/vote_001_tally.txt in "normal" elections. In this complicated systemd voting less so https://vote.debian.org/~secretary/gr_initsystems/tally.txt
