10 candidates are allowed to participate in the election phase to choose moderators in this election. Is there any reason for the number 10? I've been reading the answers to the questions serious candidates take the time to answer thoughtfully(Moderator Election Q&A), and I dislike the idea of scrutinizing all the information there is to consider for 10 separate candidates to elect 3 moderators.
How are the number of candidates for the election phase determined?
Thank you.