I don't think you would receive an answer from them.
They just started downvoting all of my recent comments and posts just today without any reason specified. While their bot is run by scripts, those scripts were created by humans who are responsible for maintaining their "service" and explaining how their bot works to the Hive public.
exactly -
consider reviewing your witness votes
each and every account has exactly 30 witness votes assigned
UNUSED witness votes are de facto votes for the oligarchy
Thanks for your suggestion, but I would rather slowly learn for deserving Hive Witnesses rather than voting anyone below the Top 20 Witnesses and then unvoting them later. Typically, I learn which Hive accounts to vote for as Witness by being able to talk productively with their owners on Hive.