Sometimes an admin will remove a word from the cloud if it's kind of redundant. Or if people obviously know where to go to discuss a topic. Janeway topics are pretty much going to be in here. Another example would be the word "Voyager." It doesn't need to be mega sized in the cloud as there is a whole forum devoted to it. Don't take offense to anything in the tag cloud. It gets cleaned from time to time. No conspiracy. Maybe.
If it was a mod cleaning up the cloud why was the tag "star trek" not removed? Surely that is the most redundant tag of all?