mmmkkk was blacklisted aftere his blackmail.

The blacklist is related to blackmail directed at the project + recently discovered support of Steemit scammers and accounts that have tried to explote Hive and/or are hostile towards sustainable progress/development of Hive ecosystem.

Any downvotes by spaminator are automatic once the blacklist is activated, as you know.
Their power is very small and is insignificant in comparison to downvotes unleashed by mmmkkk on the project's posts and comments.
No other downvotes are directed towards mmmkkk including from hivewatchers/steemcleaners accounts.