Last information I heard is that only moderators and admin can vote on some topics with stars.
To me this doesn't make much sense if it is not available for more members, maybe they can only include legendary and other top forum ranks for start.
It is best if you can contact admin and ask him about this.
Not all topics are voted on, I think only some topics are chosen by forum members such as admin, President, Vice and Mods for voting. Votes can indicate whether a topic is really valuable to the community, the number of stars is as important as the number of views and replies when members see the topic and want to interact with the topic through replies.
I think this feature is quite interesting, but the summary table shows that not many members interact with Vote. Hope Vote will show its value and be interested and used effectively by forum members. As a MixTum supporter, I gave MixTum Sig campaign 5 stars, surprisingly I don't see the average vote result @@